Physics Current Electricity NUMS 2023
PMDC Verified Question 49 of 112
Volt \(\times\) Ampere is the unit of:
A
Current
B
Volt
C
Resistance
D
Power
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option D: Power
Concept:

Electrical Power represents the rate at which electrical energy is transferred.

Formula:

$$ P = V \times I $$

Solution:

  • Voltage (V) provides the energy per unit charge (Joules/Coulomb).


  • Current (I) is the flow rate of charge (Coulombs/second).


  • Multiplying them (Joules/Coulomb \(\times\) Coulombs/second) leaves Joules/second, which defines the Watt, the unit of Power.


Why other options are incorrect:

  • Opt A: Current is just Ampere.


  • Opt B: Volt is just Joules/Coulomb.


  • Opt C: Resistance is Volt / Ampere.

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