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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

A 1 µF condenser is charged to 50 V. The charging battery is then disconnected and a 10 mH coil is connected across the capacitor so that LC oscillations occur. What is the maximum current in the coil ? Assume that the circuit contains no resistance. The capacity of a pure capacitor is 1 F. In d.c. circuits, its effective resistance will be

In figure, AC source of emf e = 100√2 sin 60 πt volt and ammeter reads 5 A. The value of L is:

At resonance, the peak value of current in a series L-C-R circuit is (symbols have their usual meanings):

In the circuit shown, the AC source has voltage V=20 cos(ωt) volt with ω=2000 rad/s. The magnitude of amplitude of current will be nearly

The frequency for which a 5 µF capacitor has a reactance of 1/1000 Ω is given by

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:

When a capacitor is connected in series LR circuit, the alternating current flowing in the circuit:

The equation of alternating current is I = 40√2 sin200 πε ampere, then the frequency and r.m.s. value of current is respectively

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