Alternating Current questions
577 published questions with worked solutions.
- A 10 resistance, 5 mH coil and 10 capacitor are joined in series. When alternating current source of suitable frequency is joined...
- Resistor of 2 , , inductor of 100 , and capacitor of 400 pF are connected in series across an a.c. source of e_ rms = 0.1 volt....
- An alternating voltage of 22 V is applied across an inductance coil of reactance 11 , . If the inductance of the coil is 0.07 H,...
- In series L-C-R circuit, the capacitance is changed from 'C' to '2C'. To obtain the same resonance frequency the inductance...
- A current of 5 A is flowing at 220 V in the primary coil of transformer. If the voltage produced in the secondary coil is 2200 V...
- An ideal transformer converts 220V a.c. to 3.3 KV a.c. to transmit a power of 4.4 KW. If primary coil has 600 turns then...
- In series LCR circuit, resistance is 18 and impedance 33 . An r.m.s. Voltage of 220 V is applied across the circuit. The true...
- In an a.c. circuit containing L, C and R in series, the ratio of apparent power to the true power is (Z = impedance of the...
- A light bulb connected in series with a capacitor and an a.c.source is glowing with certain brightness. On reducing the value of...
- The a.c. source of e.m.f. with instantaneous value 'e' is given by e = 200 sin (50t) volt. The r.m.s. value of current in a...
- The a.c. source is connected to series L C R circuit. If voltage across R is 40 V, that across L is 80 V and that across C is...
- When 100 V d.c. is applied across a solenoid, a current of 1A flows in it. When 100 V a.c. is applied across it, the current...
- The number of turns in the primary of a transformer are 1000 and in secondary 3000. If 80 V a.c. is applied to the primary, the...
- In LCR resonant circuit, the current and voltage have phase difference
- An inductance of 300 mH, a capacitance of 1 mF and a resistance of 20 , are connected in series with an a.c. source of 240V,...
- With gradual increase in frequency of an a.c. supply, the impedance of an LACR series circuit
- A coil having an inductance of 1 H is connected in series with a resistance of 300 . If A.C. source (20 V – 200 Hz) is connected...
- The resistance offered by the inductor (X_L) in an ac circuit is
- The primary and secondary voltage of an ideal step down transformer is 200 V and 25 V respectively. The secondary is connected to...
- The inductance coil of inductance 0.25 mH has a reactance of 330 , , when connected to an a.c. source. The frequency of a.c....
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