If 'V' is applied potential difference across a resistance 'R', then loss in potential energy per unit time is:
Correct answer: D. All of the above
- A. VI
- B. I2R
- C. V2/R
- D. All of the above
Explanation
The correct answer is D, 'All of the above', because each option provides a valid formula for calculating power in an electrical circuit. Power is defined as the rate of energy transfer. Option A (VI), Option B (I2R), and Option C (V2/R) are all equivalent expressions that describe power dissipation based on different parameters of the circuit. Therefore, all options correctly represent the loss in potential energy per unit time.
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About Power
Power is the rate at which work is done or energy is transferred, with average power calculated over a time interval and instantaneous power found from P = Fv when force and velocity are aligned. Work includes units, mechanical efficiency, and the distinction between power and total work or energy.
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