Question:
Current in a coil changes from 5 A to 10 A in 0.2 s. If the coefficient of self-induction is 10 H, then the induced emf is
Current in a coil changes from 5 A to 10 A in 0.2 s. If the coefficient of self-induction is 10 H, then the induced emf is
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Current in a coil changes from 5 A to 10 A in 0.2 s. If the coefficient of self-induction is 10 H, then the induced emf is
Updated On: Apr 15, 2026
- 112 V
- 250 V
- 125 V
- 230 V
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The Correct Option is B
Solution and Explanation
Step 1: Formula
Induced emf is given by $e = L \frac{di}{dt}$.
Step 2: Calculation
$e = 10 \times \frac{(10 - 5)}{0.2}$.
$e = 10 \times \frac{5}{0.2} = 10 \times 25 = 250 \text{ V}$.
Final Answer: (b)
Induced emf is given by $e = L \frac{di}{dt}$.
Step 2: Calculation
$e = 10 \times \frac{(10 - 5)}{0.2}$.
$e = 10 \times \frac{5}{0.2} = 10 \times 25 = 250 \text{ V}$.
Final Answer: (b)
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