Alternating Current questions
577 published questions with worked solutions.
- An inductor of 0.5 mH, a capacitor of 200 F and a resistor of 2 are connected in series with a 220 V ac source. If the current is...
- An ideal transformer with purely resistive load operates at 12 kV on the primary side. It supplies electrical energy to a number...
- A series combination of resistor of resistance 100 inductor of inductance 1 H and capacitor of capacitance 6.25 is connected to...
- Given below are two statements: Statement I: Maximum power is dissipated in a circuit containing an inductor, a capacitor and a...
- Given below are two statements: Statement I : When the frequency of an a.c source in a series LCR circuit increases, the current...
- Given below are two statements: Statement I : An AC circuit undergoes electrical resonance if it contains either a capacitor or...
- A series LCR circuit is connected to an AC source of 220 V, 50 Hz. The circuit contains a resistance R = 80 , an inductor of...
- An LCR series circuit of capacitance 62.5 and resistance of 50 , is connected to an A.C. source of frequency 2.0 kHz. For maximum...
- An inductor of inductance 2 is connected in series with a resistance, a variable capacitor and an AC source of frequency 7 kHz....
- In the given circuit, rms value of current (I_ rms ) through the resistor R is
- An alternating voltage source V = 260 sin (628t) is connected across a pure inductor of 5 mH. Inductive reactance in the circuit...
- A series LCR circuit consists of R = 80 , X_L = 100 , and X_C = 40 . The input voltage is 2500 cos(100 ) V. The amplitude of...
- An inductor of 0.5 mH, a capacitor of 20 and resistance of 20 are connected in series with a 220 V ac source. If the current is...
- The power factor of an AC circuit having resistance (R) and inductance (L) connected in series and an angular velocity is
- In a transformer, number of turns in the primary coil are 140 and that in the secondary coil are 280. If current in primary coil...
- The core of any transformer is laminated so as to
- Alternating current can not be measured by D.C. ammeter because
- In an LCR series a.c. circuit, the voltage across each of the components, L, C and R is 50 V. The voltage across the LC...
- In a LCR circuit capacitance is changed from C to 2C. For the resonant frequency to remain unchanged, the inductance should be...
- The self inductance of the motor of an electric fan is 10H. In order to impart maximum power at 50 Hz, it should be connected to...
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