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Questions and Answers
What unit is used to measure electric current?
What unit is used to measure electric current?
- Ohms
- Volts
- Watts
- Amperes (correct)
What does the term 'potential difference' refer to in a circuit?
What does the term 'potential difference' refer to in a circuit?
- The difference in electric charge between two points (correct)
- The amount of resistance provided by a load
- The energy consumed by the circuit components
- The flow rate of electrons in a circuit
What best describes the direction of electron flow in a circuit?
What best describes the direction of electron flow in a circuit?
- Towards higher voltage
- In random directions
- Opposite to conventional current (correct)
- Only through conductive materials
What is the purpose of a switch in an electric circuit?
What is the purpose of a switch in an electric circuit?
Which of the following components is not typically associated with open circuits?
Which of the following components is not typically associated with open circuits?
Flashcards
Electric Circuit
Electric Circuit
A path that allows electrons to flow from a source of electrical energy to a device that uses the energy.
Switch
Switch
A component in a circuit that controls the flow of electrons by opening or closing the path.
Open Circuit
Open Circuit
A circuit where the path is broken, preventing the flow of electrons.
Electric Current
Electric Current
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Voltage
Voltage
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Study Notes
Electric Circuits: Models and Analogies
- Electric circuits can be modeled using analogies, comparing them to familiar systems.
- Switches and wires are fundamental components in circuits, controlling the flow of electricity.
- Open circuits prevent current flow due to a break in the circuit.
Movement of Electrons
- Electrons move in one direction through a closed circuit.
Electric Current
- Electric current measures the rate of flow of electric charge.
- The unit of electric charge is the coulomb.
- Amperes (A) measure electric current.
- Ammeters are instruments used to measure electric current.
Electric Fields and Circuit
- An electric field exists within and around a circuit.
- Conventional current flow is defined as the theoretical flow of positive charge, opposite the electron flow.
Electrical Resistance
- Loads (resistors) oppose the flow of electric current.
- These loads are essential components in various circuits and appliances.
Potential Difference (Voltage)
- Potential difference (voltage) measures the difference in electric potential energy between two points in a circuit.
- The unit for potential difference is the volt.
- Voltage is necessary to drive electric current through a circuit.
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