The self-induced emf in a coil of 0.4 H self-inductance when current in it is changing at the rate of 50 As -1, is

Question

The self-induced emf in a coil of 0.4 H self-inductance when current in it is changing at the rate of 50 As -1, is (A) 8 × 10-4 V (B) 8 × 10-3 V (C) 20 V (D) 500 V

Tardigrade Admin · Accepted Answer

The induced emf is given by |e|=(L (d i/d t))=0.4 × 50=20 V

Q. The self-induced emf in a coil of $0.4 H$ self-inductance when current in it is changing at the rate of $50 A s^{- 1}$ , is

$8 \times 1 0^{- 4} V$

$8 \times 1 0^{- 3} V$

$20 V$

$500 V$

The induced emf is given by
$∣ e ∣ = (L \frac{d i}{d t}) = 0.4 \times 50 = 20 V$

Q. The self-induced emf in a coil of 0.4H self-inductance when current in it is changing at the rate of 50As−1, is

8×10−4V

8×10−3V

20V

500V