MEDIUM
JEE Main
IMPORTANT
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In an circuit, . When capacitance is removed, the current lags behind the voltage by . When inductance is removed, the current leads the voltage by . The impedance of the circuit is,

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Important Questions on Alternating Current
MEDIUM
JEE Main
IMPORTANT
For the series circuit shown in the figure, what is the resonance frequency and value of the current at the resonating frequency?

MEDIUM
JEE Main
IMPORTANT
Following figure shows an AC generator connected to a block box through a pair of terminals. The box contains possible or their combination, whose elements and arrangements are not known to us.
Measurements outside the box reveals that , then the wrong statement is

MEDIUM
JEE Main
IMPORTANT
A resistor , an inductor and a capacitor are connected in series to an oscillator of frequency . If the resonant frequency is , then the current lags behind voltage when

MEDIUM
JEE Main
IMPORTANT
The rms current in an AC circuit is . If the watt-less current is , then what is the power factor?

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JEE Main
IMPORTANT
capacitor and resistance are joined in series to an ac source of and frequency. The power factor of the circuit and the power dissipated in it will be, respectively,

MEDIUM
JEE Main
IMPORTANT
The self-inductance of a choke coil is . When it is connected with a DC source, then the loss of power is . When it is connected with AC source, loss of power is . The frequency of AC source will be

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JEE Main
IMPORTANT
A group of electric lamps having a total power rating of is supplied by an ac voltage . The r.m.s. value of the circuit current is

MEDIUM
JEE Main
IMPORTANT
In an circuit, the inductive reactance is equal to the resistance of the circuit. An emf is applied to the circuit. The power consumed in the circuit is
