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Questions and Answers
True or false: Adding another bulb in the circuit will decrease the overall resistance of the circuit.
True or false: Adding another bulb in the circuit will decrease the overall resistance of the circuit.
False (B)
True or false: A resistor opposes the flow of current in a circuit.
True or false: A resistor opposes the flow of current in a circuit.
True (A)
True or false: The combined resistance of two bulbs in series is equal to the sum of their individual resistances.
True or false: The combined resistance of two bulbs in series is equal to the sum of their individual resistances.
True (A)
True or false: Ohm's law defines resistance as the ratio of voltage to current.
True or false: Ohm's law defines resistance as the ratio of voltage to current.
True or false: A nichrome filament used in a toaster is an example of a resistance.
True or false: A nichrome filament used in a toaster is an example of a resistance.
True or false: When the switch is in the on position, the single bulb in the circuit glows?
True or false: When the switch is in the on position, the single bulb in the circuit glows?
True or false: Two resistances can be combined in series and parallel?
True or false: Two resistances can be combined in series and parallel?
True or false: Ohm's law defines resistance as the ratio of voltage to current?
True or false: Ohm's law defines resistance as the ratio of voltage to current?
True or false: Adding another bulb in the circuit will increase the overall resistance of the circuit?
True or false: Adding another bulb in the circuit will increase the overall resistance of the circuit?
True or false: A resistor opposes the flow of electric current?
True or false: A resistor opposes the flow of electric current?
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Study Notes
Electricity and Resistance
- A simple circuit with a single bulb is a basic electric circuit where the bulb glows when the switch is in the on position.
- The bulb is called a resistor because it opposes the flow of current in the circuit.
Resistance
- A resistance or resistor is something that opposes the flow of electric current.
- Examples of resistances or resistors include a bulb, a nichrome filament used in a toaster, and small resistors seen in a school lab.
- Resistance is defined as the ratio of voltage to current according to Ohm's Law.
Combination of Resistances
- There are two ways to combine resistances: series and parallel.
- The combination of resistances can be achieved by adding multiple bulbs to a circuit.
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