Alternating Current questions
577 published questions with worked solutions.
- In an a.c. circuit, a resistance 'R' is connected in series with an inductance 'L'. If phase angle between voltage and current is...
- An a.c. source of frequency 'f' is connected to a circuit containing an inductance 'L' and resistance 'R' in series. The...
- An a.c. voltage is applied to pure inductor. The current in the inductor
- The power factor of a CR circuit is 1 2 , If the frequency of a.c. signal is halved, then the power factor of the circuit will...
- In LCR series circuit, when ‘L’ is removed from the circuit, the phase difference between voltage and current in the circuit is 3...
- In an a.c. circuit containing L, C, R in series the ratio of true power to apparent power is (Z = impedance of the circuit and R...
- In series LCR circuit R = 18 and impedance is 30 . An rms voltage 210 V is applied across the circuit. The true power consumed in...
- L, C and R are connected in series to an a.c. source. Which one of the following is true? Phase relation between current and...
- A resistor of 50 , inductor of self inductance ( 2 ^2 )H and a capacitor of unknown capacity are connected in series to an a.c....
- An inductor of ( 100 )mH, capacitor of capacitance ( 10^ -3 2 )F and resistance of 10 are connected in series with AC voltage...
- In a series L − C − R circuit, C = 10^ -11 Farad, L = 10^ -5 Henry and R = 100Ohm, when a constant D.C. voltage E is applied to...
- When resonance is produced in a series LCR circuit, then which of the following is not correct?
- A series LR circuit is connected to an ac source of frequency ω and the inductive reactance is equal to 2R. A capacitance of...
- When the rms voltages V_L, V_C and V_R are measured respectively across the inductor L, the capacitor C and the resistor R in a...
- A sinusoidal voltage V(t) = 100 (500t) is applied across a pure inductance of L = 0.02H. The current through the coil is:
- An ac circuit contains a resistance of 1 k , a capacitor of 0.1 and an inductor of 1 mH connected in series. The resonance...
- An ac voltage V=220 (2 10^3t) Volt is applied to a series LCR circuit. Then the current amplitude in this circuit is: (Given :...
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