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In the circuit diagram shown, XC=100 Ω, XL=200Ω and R=100 Ω. The effective current through the source is

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Important Questions on Alternating Current

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JEE Main/Advance
IMPORTANT

In the shown AC circuit phase different between currents I1 and I2 is

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MEDIUM
JEE Main/Advance
IMPORTANT
For a LCR series circuit with an A.C. source of angular frequency ω:
EASY
JEE Main/Advance
IMPORTANT
The primary and secondary coil of transformer have 50 and 5000 turns respectively. If the magnetic flux ϕ linked with the primary coil is given by ϕ=ϕ0+4 t, where ϕ is in Webers, t is time in seconds and ϕ0 is a constant then calculate the output voltage (in volt) across the secondary coil.
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JEE Main/Advance
IMPORTANT

A periodic voltage wave from has been shown in fig. Determine the average value of voltage (in V).

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JEE Main/Advance
IMPORTANT

The source voltage and current in the circuit are represented by the following equations E=110 sinωt+π6 volt, I=5sinωt-π6 ampere.

Find Impedance of circuit (in ohm).

MEDIUM
JEE Main/Advance
IMPORTANT

When an alternating voltage of 220 V is applied across a device X, a current of 0.5 A flows through the circuit and is phase with the applied voltage. When the same voltage is applied across another device Y, the same current again flows through the circuit but it leads the applied voltage by π2 radians.

Calculate the current (in ampere) flowing in the circuit when same voltage is applied across the series combination of X and Y.

MEDIUM
JEE Main/Advance
IMPORTANT
In an alternating circuit connected to an emf of 100 volt and frequency 50 Hz, a resistance of 10 ohm and m inductance of 110π H are connected in series. Find out the power dissipated in the circuit (in watts).
MEDIUM
JEE Main/Advance
IMPORTANT

An alternating voltage V0=100 V with angular frequency ω is connected across the capacitor and inductor having XL=5 Ω and XC=10 Ω. Find the ratio of current through inductor to AC source.

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