CUET · PHYSICS · PYQ PAPER 2023
The average emf induced in a coil in which current changes from 2 A to 4 A in 0.05 sec is 8 V. The self - inductance of coil is :
- A \(0.1 H\)
- B \(0.2 H\)
- C \(0.4 H\)
- D \(0.8 H\)
Answer & Solution
Correct Answer
(B) \(0.2 H\)
Step-by-step Solution
Detailed explanation
\(\mathcal{E} = L \left| \frac{\Delta I}{\Delta t} \right|\) \(8 = L \frac{4-2}{0.05}\) \(L = \frac{8 \times 0.05}{2} = 0.2 \, H\)
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