A 10 V battery connected to 5 Ω resistance coil having inductance 10 H through a switch…
Physics · Class 12 · CBSE — Electromagnetic Induction
A 10 V battery connected to 5 Ω resistance coil having inductance 10 H through a switch drives a constant current in the circuit. The switch is suddenly opened and the time taken to open it is 2 ms. The average emf induced across the coil is
- 4 × 104 V
- 2 × 104 V
- 2 × 102 V
- 1 × 104 V
Answer
(D) 1 × 10 4 V
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