Physics Electrostatics NUMS 2022
PMDC Verified Question 86 of 131
Q.146 It stores electrical potential energy:
A
Capacitor
B
Conductor
C
Inductor
D
Generator
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: Capacitor
1. Concept:

A capacitor is specifically engineered to hold an electrostatic field between isolated parallel plates, fundamentally serving as a short-term energy reservoir.

2. Formula:

$$ U_E = \frac{1}{2} C V^2 $$

3. Solution:

  • When connected to a source, charges accumulate on the plates, establishing an electric field that locks in electrical potential energy until discharged.


4. Why other options are incorrect:

An Inductor stores energy in a Magnetic field, not an electric potential field. A Generator converts mechanical energy into electrical energy dynamically, rather than statically storing it.

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