The opposition to the flow of electric charge. Resistance opposes the flow of electric current.
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True or False: Ohm’s Law applies only to non-ohmic conductors.
Answer: False. Ohm’s Law applies to ohmic conductors, where voltage and current have a linear relationship.
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True or False: Cells (batteries) connected in series add their voltages together.
Answer: True. In series, the voltages of cells add together.
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10
Explain the difference between voltage in a series circuit and a parallel circuit.
In a series circuit, voltage is divided between components. In a parallel circuit, the voltage across each branch is the same as the source voltage.
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5
In a series circuit, what happens to the current across each component?
c) It remains the same
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5
What is the unit of electric current?
Ampere (A)
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5
True or False: Voltage is the electrical energy used to push charges through a circuit.
Answer: True. Voltage, also called potential difference, is the force that pushes charges.
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5
Which of the following is true about voltage in a parallel circuit?
It remains the same across all components. In parallel circuits, voltage is the same across each branch.
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What happens to the total resistance when resistors are connected in parallel?
It decreases. In parallel, total resistance decreases as more paths are available for current to flow.
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15
Describe what would happen to the brightness of two bulbs if they are connected in series versus parallel.
The bulbs will be dimmer because they share the voltage. Parallel: The bulbs will be brighter because each gets the full voltage from the power source.
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5
True or False: In a series circuit, the current is the same through all components.
Answer: True. Current is the same through all components in a series circuit.
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5
What happens to the total resistance when resistors are connected in series?
It increases. In series, resistances add up, increasing total resistance.
