Alternating Current questions
577 published questions with worked solutions.
- A series LCR circuit with R = 5 , L = 20 mH and C = 0.5 is connected across an AC supply of 250 V, having variable frequency. The...
- In an LCR series circuit, an inductor 30 mH and a resistor 1 are connected to an AC source of angular frequency 300 rad/s. The...
- A series LCR circuit is designed to resonate at an angular frequency _0=10^5 rad/s. The circuit draws 16 W power from 120 V...
- A resonance circuit having inductance and resistance 2 10^ -4 H and 6.28 respectively oscillates at 10 MHz frequency. The value...
- A common transistor radio set requires 12V (D.C.) for its operation. The D.C. source is constructed by using a transformer and a...
- In a circuit, L, C and R are connected in series with an alternating voltage source of frequency f. The current leads the voltage...
- A 0.07 H inductor and a 12 resistor are connected in series to a 220. V, 50 Hz ac source. The approximate current in the circuit...
- A 100 resistance, a 0.1 capacitor and an inductor are connected in series across a 250 V supply at variable frequency. Calculate...
- The alternating current is given by i= 42 ( 2 T t )+10 A The r.m.s. value of this current is ........ A.
- An ac circuit has an inductor and a resistor of resistance R in series, such that X_L = 3R. Now, a capacitor is added in series...
- In an ac circuit, an inductor, a capacitor and a resistor are connected in series with X_L = R = X_C. Impedance of this circuit...
- An LCR circuit contains resistance of 110 and a supply of 220 V at 300 rad/s angular frequency. If only capacitance is removed...
- A 10 resistance is connected across 220V – 50Hz AC supply. The time taken by the current to change from its maximum to the rms...
- In the given circuit the AC source has = 100 rad s^ -1 . Considering the inductor and capacitor to be ideal, the what will be the...
- A series LCR circuit driven by 300 V at a frequency of 50 Hz contains a resistance R = 3 k , an inductor of inductive reactance...
- An alternating current is given by the equation i = i_1 t+i_2 t. The rms current will be :
- In a series LCR resonant circuit, the quality factor is measured as 100. If the inductance is increased by two fold and...
- A resistance of 40 is connected to a source of alternating current rated 220 V, 50 Hz. Find the time taken by the current to...
- Given below are two statements: Statement-I : The reactance of an ac circuit is zero. It is possible that the circuit contains a...
- To increase the resonant frequency in series LCR circuit,
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