Navigate

The induced emf in a coil of 10 H inductance in which current varies

The induced emf in a coil of 10 H inductance in which current varies from 9 A to 4 A in 0.2 s is

Options

(a) 200 V
(b) 250 V
(c) 300 V
(d) 350 V

Correct Answer:

250 V

Explanation:

Induced emf, e = -L (di / dt)
Given, L = 10 H, Δi = 9 – 4 = 5 A,
dt = 0.2 s
emf, e = 10 × (5 / 0.2) = 250 V

JK2013
admin:

Related Questions

  1. In nuclear fission, the percentage of mass converted into energy is about
  2. A solenoid 1.5 m long and 0.4 cm in diameter possesses 10 turns per cm length
  3. Parsec is the unit of
  4. For having large magnification power of a compound microscope
  5. The refractive index of water, glass and diamond are 1.33, 1.50, 2.40 respectively