If the potential difference across the two plates of a parallel plate capacitor is doubled, then the energy stored in it will be:
Correct answer: B. 4 times
- A. 2 times
- B. 4 times
- C. 10 times
- D. Remains same
Explanation
The energy (U) stored in a capacitor is given by the formula U = (1/2)CV². Since the energy is proportional to the square of the potential difference (V), doubling the voltage will increase the stored energy by a factor of 2², which is 4.
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Electrostatics describes forces between charges through Coulomb's law, electric fields and field intensity, then uses electric potential to measure energy per unit charge. Capacitors store charge and electrical energy, with capacitance depending on geometry and dielectric material, not simply on the amount of charge present.
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