NEET Physics Ohm's Law MCQ Question
If a resistor with resistance R is connected across a cell with electromotive force (emf) e and negligible internal resistance, what is the power dissipated in the resistor?
(e^2) / R
R / e^2
e^2 * R
e / R
Correct Answer
Detailed Explanation
The power dissipated in a resistor is given by the formula P = V^2 / R. With negligible internal resistance, the full emf (e) acts across R, so the power dissipated is P = (e^2) / R.
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