Quick questions on Current and Ohm's law - MA Introductory Physics MCAS Module 6

3short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.

What is q1?

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A current of

2.0

A flows through a

5.0

ohm resistor. Calculate the voltage across it. [2]

What is q2?

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9.0

V battery drives a current of

3.0

A through a component. Calculate its resistance. [2]

What is not rearranging Ohm's law?

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If the unknown is the current or the resistance, rearrange

V = IR

first:

I = V/R

R = V/I

. Putting numbers into the wrong form loses the mark.

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