Podcast
Questions and Answers
What is the definition of resistance?
What is the definition of resistance?
- The flow of electrons in a conductor
- The rate of flow of electric charge in a circuit
- A measure of how much a material opposes the flow of electric current (correct)
- A property of matter that causes it to experience a force in an electric field
What represents a low resistance environment in the break time scenario?
What represents a low resistance environment in the break time scenario?
- The classroom doorway
- The narrow corridor
- The open field (correct)
- The school building
What is an electrical component that adds resistance to a circuit?
What is an electrical component that adds resistance to a circuit?
- A conductor
- A delocalised electron
- A resistor (correct)
- An electric current
What is the term for electrons that are not associated with a particular atom and can move freely?
What is the term for electrons that are not associated with a particular atom and can move freely?
What is the unit of measurement for resistance?
What is the unit of measurement for resistance?
What causes electrons to move towards the positive terminal, creating an electric current?
What causes electrons to move towards the positive terminal, creating an electric current?
What is the term for a material that allows the flow of electric charge?
What is the term for a material that allows the flow of electric charge?
What opposes the flow of electrons in a circuit?
What opposes the flow of electrons in a circuit?
What is the rate at which electric charge flows through a conductor in a closed circuit?
What is the rate at which electric charge flows through a conductor in a closed circuit?
What is the property of matter that causes it to experience a force in an electric field?
What is the property of matter that causes it to experience a force in an electric field?
What percentage of electrical energy is converted into light in an incandescent bulb?
What percentage of electrical energy is converted into light in an incandescent bulb?
What percentage of electrical energy is wasted as heat in an LED?
What percentage of electrical energy is wasted as heat in an LED?
Which of the following factors affects the resistance of a conductor?
Which of the following factors affects the resistance of a conductor?
What is the relationship between current, voltage, and resistance described by?
What is the relationship between current, voltage, and resistance described by?
What is the term for the ability of a material to conduct electricity?
What is the term for the ability of a material to conduct electricity?
What is the purpose of resistors in electrical circuits?
What is the purpose of resistors in electrical circuits?
What happens to the resistance of a conductor when its thickness increases?
What happens to the resistance of a conductor when its thickness increases?
What happens when electrons moving through a conductor collide with the atoms of the material?
What happens when electrons moving through a conductor collide with the atoms of the material?
What is the function of a rheostat in a circuit?
What is the function of a rheostat in a circuit?
What is the effect of increasing the length of a conductor on its resistance?
What is the effect of increasing the length of a conductor on its resistance?
What is the purpose of using a resistor in a circuit with an LED?
What is the purpose of using a resistor in a circuit with an LED?
What happens to the resistance of a conductor when its temperature increases?
What happens to the resistance of a conductor when its temperature increases?
What is a characteristic of a diode?
What is a characteristic of a diode?
Why does the filament in an incandescent bulb heat up and emit light?
Why does the filament in an incandescent bulb heat up and emit light?
Why are LEDs more efficient than incandescent light bulbs?
Why are LEDs more efficient than incandescent light bulbs?
What is the purpose of coiling the filament in an incandescent bulb?
What is the purpose of coiling the filament in an incandescent bulb?
How many primary factors affect the resistance of a conductor?
How many primary factors affect the resistance of a conductor?
What is the symbol used to represent a resistor in a circuit diagram?
What is the symbol used to represent a resistor in a circuit diagram?
What is the result of increasing the resistance in a circuit?
What is the result of increasing the resistance in a circuit?
What is the purpose of resistors in controlling the brightness of a light bulb?
What is the purpose of resistors in controlling the brightness of a light bulb?
What happens to the current in a circuit when the resistance is increased?
What happens to the current in a circuit when the resistance is increased?
What is the purpose of using a resistor in a circuit with an LED?
What is the purpose of using a resistor in a circuit with an LED?
What is the relationship between the resistance of a conductor and its temperature?
What is the relationship between the resistance of a conductor and its temperature?
What is the function of a rheostat in a circuit?
What is the function of a rheostat in a circuit?
Why are LEDs more efficient than incandescent light bulbs?
Why are LEDs more efficient than incandescent light bulbs?
What is the result of collisions between electrons and the atoms of a conductor?
What is the result of collisions between electrons and the atoms of a conductor?
What is the main reason why movement becomes restricted in the corridor and classroom doorway during school break time?
What is the main reason why movement becomes restricted in the corridor and classroom doorway during school break time?
What is the result of connecting an energy source to a conductor?
What is the result of connecting an energy source to a conductor?
What is the purpose of a conductor in an electrical circuit?
What is the purpose of a conductor in an electrical circuit?
What is the effect of resistance on the flow of electrons in a circuit?
What is the effect of resistance on the flow of electrons in a circuit?
What is the significance of delocalised electrons in metals?
What is the significance of delocalised electrons in metals?
What is the relationship between the flow of electrons and the electric current in a conductor?
What is the relationship between the flow of electrons and the electric current in a conductor?
What is the main difference between incandescent bulbs and LEDs?
What is the main difference between incandescent bulbs and LEDs?
What is the effect of increasing the cross-sectional area of a conductor?
What is the effect of increasing the cross-sectional area of a conductor?
What happens to the resistance of a conductor when its length is increased?
What happens to the resistance of a conductor when its length is increased?
What is the effect of increasing the temperature of a conductor?
What is the effect of increasing the temperature of a conductor?
Why is the filament in an incandescent bulb coiled?
Why is the filament in an incandescent bulb coiled?
What is the purpose of using a Sankey diagram?
What is the purpose of using a Sankey diagram?
What is the primary factor that affects the resistance of a conductor?
What is the primary factor that affects the resistance of a conductor?
What is the relationship between the length of a conductor and its resistance?
What is the relationship between the length of a conductor and its resistance?
What is the primary reason for resistance in a conductor?
What is the primary reason for resistance in a conductor?
What is the outcome of adding a resistor to a circuit?
What is the outcome of adding a resistor to a circuit?
What is the main difference between a conductor and an insulator?
What is the main difference between a conductor and an insulator?
What happens to the flow of electrons in a conductor when the resistance increases?
What happens to the flow of electrons in a conductor when the resistance increases?
What is the purpose of delocalised electrons in a metal?
What is the purpose of delocalised electrons in a metal?
What occurs when an energy source is connected to a conductor?
What occurs when an energy source is connected to a conductor?
What is the main advantage of using LEDs over incandescent bulbs?
What is the main advantage of using LEDs over incandescent bulbs?
What is the effect of increasing the thickness of a conductor on its resistance?
What is the effect of increasing the thickness of a conductor on its resistance?
Why do electrons encounter more collisions as they travel through a longer conductor?
Why do electrons encounter more collisions as they travel through a longer conductor?
What is the effect of increasing the temperature of a conductor on its resistance?
What is the effect of increasing the temperature of a conductor on its resistance?
What is the purpose of using a Sankey diagram in the context of energy transfer?
What is the purpose of using a Sankey diagram in the context of energy transfer?
What is the relationship between the cross-sectional area of a conductor and its resistance?
What is the relationship between the cross-sectional area of a conductor and its resistance?
What is the primary factor that affects the resistance of a conductor?
What is the primary factor that affects the resistance of a conductor?
What happens to the resistance of a conductor when its length is increased?
What happens to the resistance of a conductor when its length is increased?
What is the main reason why devices like cellphone chargers become warm during use?
What is the main reason why devices like cellphone chargers become warm during use?
What is the primary function of a rheostat in a circuit?
What is the primary function of a rheostat in a circuit?
Why do LEDs only allow current to flow in one direction?
Why do LEDs only allow current to flow in one direction?
What happens to the current in a circuit when the resistance is increased?
What happens to the current in a circuit when the resistance is increased?
What is the main advantage of LEDs over incandescent bulbs?
What is the main advantage of LEDs over incandescent bulbs?
What is the purpose of using a resistor in a circuit with an LED?
What is the purpose of using a resistor in a circuit with an LED?
What happens to the movement of learners when they enter the narrow corridor and doorway during school break time?
What happens to the movement of learners when they enter the narrow corridor and doorway during school break time?
What is the flow of electric charge in a circuit?
What is the flow of electric charge in a circuit?
What happens when an energy source is connected to a conductor?
What happens when an energy source is connected to a conductor?
What is the significance of delocalised electrons in metals?
What is the significance of delocalised electrons in metals?
What is the effect of resistance on the flow of electrons in a circuit?
What is the effect of resistance on the flow of electrons in a circuit?
What is the relationship between the flow of electrons and the electric current in a conductor?
What is the relationship between the flow of electrons and the electric current in a conductor?
What is the result of increasing the thickness of a conductor?
What is the result of increasing the thickness of a conductor?
What happens when electrons moving through a conductor collide with the atoms of the material?
What happens when electrons moving through a conductor collide with the atoms of the material?
What is the main difference between the movement of learners in the field and the corridor during school break time?
What is the main difference between the movement of learners in the field and the corridor during school break time?
What is the primary purpose of a Sankey diagram in relation to lighting systems?
What is the primary purpose of a Sankey diagram in relation to lighting systems?
What is the effect of increasing the length of a conductor on its resistance?
What is the effect of increasing the length of a conductor on its resistance?
What is the relationship between the cross-sectional area of a conductor and its resistance?
What is the relationship between the cross-sectional area of a conductor and its resistance?
What happens to the resistance of a conductor when its temperature increases?
What happens to the resistance of a conductor when its temperature increases?
Why are LEDs more efficient than incandescent light bulbs?
Why are LEDs more efficient than incandescent light bulbs?
What is the effect of increasing the thickness of a conductor on its resistance?
What is the effect of increasing the thickness of a conductor on its resistance?
What is the purpose of coiling the filament in an incandescent bulb?
What is the purpose of coiling the filament in an incandescent bulb?
What is the relationship between the type of material used in a conductor and its resistance?
What is the relationship between the type of material used in a conductor and its resistance?
What is the effect of increasing the resistivity of a conductor on its ability to conduct electricity?
What is the effect of increasing the resistivity of a conductor on its ability to conduct electricity?
Why do thicker wires have lower resistance than thinner wires?
Why do thicker wires have lower resistance than thinner wires?
What is the main function of resistors in electrical circuits?
What is the main function of resistors in electrical circuits?
What happens when electrons moving through a conductor collide with the atoms of the material?
What happens when electrons moving through a conductor collide with the atoms of the material?
What is the purpose of a rheostat in a circuit?
What is the purpose of a rheostat in a circuit?
What is the advantage of using LEDs over incandescent light bulbs?
What is the advantage of using LEDs over incandescent light bulbs?
What is the characteristic of a diode?
What is the characteristic of a diode?
What is the result of increasing the resistance in a circuit?
What is the result of increasing the resistance in a circuit?
What is the purpose of using a resistor in a circuit with an LED?
What is the purpose of using a resistor in a circuit with an LED?
What is the symbol used to represent a resistor in a circuit diagram?
What is the symbol used to represent a resistor in a circuit diagram?
What happens when the resistance of a conductor increases?
What happens when the resistance of a conductor increases?
What is the purpose of using a rheostat in devices such as sound equipment?
What is the purpose of using a rheostat in devices such as sound equipment?
What is the primary reason for the inefficiency of incandescent bulbs?
What is the primary reason for the inefficiency of incandescent bulbs?
What is the effect of increasing the cross-sectional area of a conductor?
What is the effect of increasing the cross-sectional area of a conductor?
Why do LEDs have a higher percentage of useful output energy compared to incandescent bulbs?
Why do LEDs have a higher percentage of useful output energy compared to incandescent bulbs?
What happens to the resistance of a conductor when its temperature increases?
What happens to the resistance of a conductor when its temperature increases?
What is the purpose of coiling the filament in an incandescent bulb?
What is the purpose of coiling the filament in an incandescent bulb?
What is the relationship between the length of a conductor and its resistance?
What is the relationship between the length of a conductor and its resistance?
What is the purpose of using a Sankey diagram?
What is the purpose of using a Sankey diagram?
What happens to the resistance of a conductor when its thickness decreases?
What happens to the resistance of a conductor when its thickness decreases?
Why do thicker wires have lower resistance?
Why do thicker wires have lower resistance?
What is the result of increasing the length of a conductor?
What is the result of increasing the length of a conductor?
Why does the flow of electric charge become restricted in the corridor and classroom doorway during school break time?
Why does the flow of electric charge become restricted in the corridor and classroom doorway during school break time?
What is the primary reason for the movement of electrons towards the positive terminal in a circuit?
What is the primary reason for the movement of electrons towards the positive terminal in a circuit?
What is the significance of delocalised electrons in metals?
What is the significance of delocalised electrons in metals?
What is the effect of increasing the length of a conductor on its resistance?
What is the effect of increasing the length of a conductor on its resistance?
Why do electrons moving through a conductor collide with the atoms of the material?
Why do electrons moving through a conductor collide with the atoms of the material?
What is the relationship between the flow of electrons and the electric current in a conductor?
What is the relationship between the flow of electrons and the electric current in a conductor?
What is the effect of increasing the temperature of a conductor on its resistance?
What is the effect of increasing the temperature of a conductor on its resistance?
What is the primary function of a conductor in an electrical circuit?
What is the primary function of a conductor in an electrical circuit?
What is the result of connecting an energy source to a conductor?
What is the result of connecting an energy source to a conductor?
What is the effect of resistance on the flow of electrons in a circuit?
What is the effect of resistance on the flow of electrons in a circuit?
What is the primary reason why resistors are used in electrical circuits?
What is the primary reason why resistors are used in electrical circuits?
What is the effect of increasing the resistance in a circuit?
What is the effect of increasing the resistance in a circuit?
What is the purpose of a rheostat in a circuit?
What is the purpose of a rheostat in a circuit?
What is the primary reason why LEDs are more efficient than incandescent bulbs?
What is the primary reason why LEDs are more efficient than incandescent bulbs?
What is the effect of electron collisions with the atoms of a conductor?
What is the effect of electron collisions with the atoms of a conductor?
What is the purpose of using a resistor in a circuit with an LED?
What is the purpose of using a resistor in a circuit with an LED?
What is the characteristic of a diode?
What is the characteristic of a diode?
What is the result of increasing the resistance in a circuit with a rheostat?
What is the result of increasing the resistance in a circuit with a rheostat?
What is the primary function of a resistor in an electrical circuit?
What is the primary function of a resistor in an electrical circuit?
What is the relationship between input energy, output energy, and energy wasted in a system?
What is the relationship between input energy, output energy, and energy wasted in a system?
What is the primary reason for the restricted movement of learners in the corridor and classroom doorway during school break time?
What is the primary reason for the restricted movement of learners in the corridor and classroom doorway during school break time?
What happens to the delocalised electrons in a conductor when an energy source is connected?
What happens to the delocalised electrons in a conductor when an energy source is connected?
What is the effect of resistance on the flow of electrons in a circuit?
What is the effect of resistance on the flow of electrons in a circuit?
What is the significance of delocalised electrons in metals?
What is the significance of delocalised electrons in metals?
What is the relationship between the flow of electrons and the electric current in a conductor?
What is the relationship between the flow of electrons and the electric current in a conductor?
What is the primary function of a conductor in an electrical circuit?
What is the primary function of a conductor in an electrical circuit?
What is the primary purpose of using a resistor in series with an LED?
What is the primary purpose of using a resistor in series with an LED?
How does the resistance of a conductor change when its temperature increases?
How does the resistance of a conductor change when its temperature increases?
What is the primary function of a rheostat in a circuit?
What is the primary function of a rheostat in a circuit?
Why are LEDs more efficient than incandescent bulbs?
Why are LEDs more efficient than incandescent bulbs?
What is the primary reason for using a diode in a circuit?
What is the primary reason for using a diode in a circuit?
What is the primary effect of increasing the resistance in a circuit?
What is the primary effect of increasing the resistance in a circuit?
What is the primary cause of energy wastage in incandescent bulbs?
What is the primary cause of energy wastage in incandescent bulbs?
What is the effect of increasing the cross-sectional area of a conductor on its resistance?
What is the effect of increasing the cross-sectional area of a conductor on its resistance?
What is the primary factor that affects the resistance of a conductor, according to the formula R = ρL/A?
What is the primary factor that affects the resistance of a conductor, according to the formula R = ρL/A?
What is the result of electrons moving through a conductor with high resistance?
What is the result of electrons moving through a conductor with high resistance?
What is the purpose of coiling the filament in an incandescent bulb?
What is the purpose of coiling the filament in an incandescent bulb?
What is the primary advantage of using LEDs over incandescent bulbs?
What is the primary advantage of using LEDs over incandescent bulbs?
What is the effect of increasing the temperature of a conductor on its resistance?
What is the effect of increasing the temperature of a conductor on its resistance?
What is the primary function of a Sankey diagram in illustrating the efficiency of energy transfer in different lighting systems?
What is the primary function of a Sankey diagram in illustrating the efficiency of energy transfer in different lighting systems?
