A conducting circular loop is placed in a uniform magnetic field, B=.025 T with its plane perpendicular to the loop. The radius of the loop is made to shrink at a constant rate of 1mms-1, The induced e.m.f. when radius is 2cm, is

Question:

Options :

(a) 2μV
(b) 2πμV
(c) πμV
(d) π/2μV

Answer :

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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:

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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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