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AP® Physics C: E & M

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Moderate

Find the Resistance Using Power, Charge and Time

APPHEM-C62KU5

A resistor with a constant current has a power of 100 W. A charge of 1500 C flows through it in 20 minutes.

Assuming it is an Ohmic device, derive an equation for the resistance and then calculate the resistance.

A

$4.4 \times 10^{-5}\ \Omega$

B

$0.016\ \Omega$

C

$0.018 \ \Omega$

D

$64 \ \Omega$

E

$9 \times 10^{10} \ \Omega$