Alternating Current questions
577 published questions with worked solutions.
- When a coil is connected to a d.c. source of e.m.f. 12 volt, then the current of 4A flows in it. If the same coil is connected to...
- In an a.c. circuit, the reactance of a coil is 3 times its resistance. The phase difference between the voltage across the coil...
- A series L-C-R circuit containing a resistance 'R' has angular frequency ' '. At resonance the voltage across resistance and...
- An inductor of inductance 2 , H is connected in series with a resistance, a variable capacitor and an a.c. source of 10 kHz. The...
- Series LCR circuit containing an a.c. source of 100V has a inductor and a capacitor of reactance 24 , and 16 , respectively. If a...
- An inductance of 2 mH, a condenser of 20 and a resistance of 50 are connected in series to an a.c.source. The reactance of...
- In an LCR circuit, if 'V' is the effective value of the applied voltage, V_R is the voltage across 'R', 'V_L' and 'V_C' is the...
- A light bulb connected in series with a capacitor and an a.c. source is glowing with a certain brightness. On reducing the...
- In LCR series circuit, an alternating e.m.f. 'e' and current 'i' are given by equations e = 160 sin(100t) volt and i = 250 sin...
- The alternating voltage is given by v = v_0 ( t + 3 ) When will be the voltage maximum for first time?
- A transformer has 120 turns in the primary coil and carries 5A current. Input power is one kilowatt. To have 560 V output, the...
- In LCR series circuit at resonance
- In an LCR series circuit, the potential difference across the terminals of the inductor, capacitor and resistor is 60 V, 30 V and...
- A series combination of resistor 'R' and capacitor 'C' is connected to an a.c. source of angular frequency ' '. Keeping the...
- In an a.c. circuit, a resistance R is connected in series with an inductance 'L'. If phase angle between voltage and current is...
- In an L – R circuit the inductive reactance is equal to 3 times the resistance 'R' of the circuit. An e.m.f. E=E_0 ( t) is...
- A coil of resistance 450 , and self-inductance 1.5 henry is connected to an a.c. source of frequency 150 Hz. The phase difference...
- A series LCR circuit is connected to an a.c. source of 230 V, 50Hz. The circuit contains resistance of 80 an inductor having...
- Two coils P and S have a mutual inductance of ( ) mH. The secondary coil S has resistance 4 and self inductance (60/ ) mH. If the...
- In series LCR circuit R = 10 and impedance is 30 . An r.m.s. voltage 210V, is applied across the circuit. The true power consumed...
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