CUET · PHYSICS · PYQ PAPER 2023
The self inductance of a coil is 200 \( \mu \)H, current changes by 1 A in 0.05 sec. What is the emf produced?
- A 5 mV
- B 2 mV
- C 1 mV
- D 4 mV
Answer & Solution
Correct Answer
(D) 4 mV
Step-by-step Solution
Detailed explanation
\( \mathcal{E} = L \frac{\Delta I}{\Delta t} \) \( \mathcal{E} = (200 \times 10^{-6} \text{ H}) \frac{1 \text{ A}}{0.05 \text{ s}} \) \( \mathcal{E} = 4 \times 10^{-3} \text{ V} = 4 \text{ mV} \)
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