A device experiences a voltage drop of 4.0 V across it while a current of 4.0 mA flows through it. How much power does it dissipate?

voltage-drop

#1

A device experiences a voltage drop of 4.0 V across it while a current of 4.0 mA flows through it. How much power does it dissipate?
A) 1.6 mW
B) 64 μW
C) 4.0 kW
D) 16 mW

Answer:

power = V I