21-Alternating current

Alternating current

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In a region of uniform magnetic induction B = $10^{-2}$ tesla, a circular coil of radius 30 cm and resistance π² ohm is ......?
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A resistance of 300 Ω and an inductance of henry are connected in series to an AC voltage of 20 volts and a 200 Hz frequency........?
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A resistance of 20 Ω is connected to a source of an alternating potential, V = 220sin(100$\pi t$) . The time taken by the.....?
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An alternating current of frequency f is flowing in a circuit containing a resistance R and a choke L in series. The impedance of this ....?
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If a current I given by $I_{0} sin(\omega t - \pi/2)$ flows in an ac circuit across which an ac potential of $E = E_0$ sin wt has .......?
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The peak value of an alternating e.m.f. E is given by E = Eo cos wt is 10 volts and its frequency is 50 Hz. At time t = 1 600 sec, the .....?
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An alternating current is given as i = i₁ cos wt + i2 sin wt. The RMS current is given by;
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A 220 V, 50 Hz AC source is connected to an inductance of 0.2 H and a resistance of 20 Ω in series. What is the current in the circuit:
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A loss free transformer has 500 turns on its primary winding and 2500 in secondary. The meters of the secondary indicate 200 volts at ......?
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A transformer has 100 turns in the primary coil and carries 8 A current. If input power is one kilowatt, the number of turns required in ....?
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A 220 V, 50 Hz AC source is connected to an inductance of 0.2 H and a resistance of 20 Ω in series. What is the current in the circuit:
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An electric motor operating on a 60 V dc supply draws a current of 10 A. If the efficiency of the motor is 50%, the resistance of its winding is
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A power transformer is used to step up an alternating e.m.f. of 220 V to 11 kV to transmit 4.4 kW of power. If the primary coil has 1000 turns......?
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The potential difference V and the current i flowing through an instrument in an ac circuit of frequency f are given by ..........?
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How to prepare for Alternating current for NEET
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A capacitor of capacitance 2µF is conn the tank circuit of an oscillator oscillati frequency of 1 kHz. If the current flow circuit is 2 m A, the volta
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How to find current in the circuit
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Understanding Coils: Common Questions and Detailed Explanations
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Understanding Mutual Inductance: Principles and Applications
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Question regarding alternating current
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