A coil of area 100 cm2 has 500 turns. Magnetic field of 0.1 weber/metre2 is perpendicular to the both ends of coil. The field is reduced to zero in 0.1 second. The induced e.m.f. in the coil is

Question:

Options :

(a) 1V
(b) 5V
(c) 50 V
(d) Zero

Answer :

(b) 5V

Answer Steps :

Step 1:

Step 2:

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An alternating voltage source is connected in series with a resistance R and an inductance L. If the potential drop across the resistance is 200 V and across the inductance is 150 V, then the applied voltage is:

In an a. c. circuit the instantaneous current and e.m.f. are represented as: I = I0 sin(ωt – π/6) and E = E0 sin(ωt + π /3) respectively. The voltage leads the current by

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