Practice Ohm’s Law (8.5) - Electricity and Magnetism

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9 questions

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6 sample questions

Question 1.
What is Ohm's Law?
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Think about how these three readings interact.
Question 2.
If you have a voltage of 12V and a resistance of 3Ω, how much current flows?
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Use the formula V = I × R.
3Question 3.
What does Ohm's Law describe?
- The relationship of voltage and current
- The relationship of current and resistance
- Both A and B
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Consider how all three terms relate to each other.
4Question 4.
True or False: If resistance is doubled, the current is halved.
- True
- False
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Remember the formula V = I × R.
Question 5.
In a circuit, if the voltage is 30V and the current is 5A, what is the resistance? Can you apply any known formula to find out?
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Look for the relationship in Ohm's Law.
Question 6.
A device operates at 240V and consumes 10A. If you want to switch to an alternative device, but keep the same power, what resistance should that device have?
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You will need to rearrange the power formula using Ohm's Law.

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