Question

A simple circuit within a laptop has a single resistor with a resistance of 0.1 Ω and requires a current of 50 mA. Select the voltage that would allow the computer to function correctly.

5 V
50 V
500 mV
5

Answer 1

V = I·R = 0.05 A · 0.1 Ω = 0.005 V = 5 mV.

None of the provided choices match that value (the closest listed is 500 mV, which is 100× too large).