Alternating Cur...

The natural frequency of a L-C circuit is equal to

In a series LCR circuit R = 200Ω and the voltage and the frequency of the main supply is 220 V and 50 Hz respectively. On taking out the capacitance from the circuit the current lags behind the voltage by 30°. On taking out the inductor from the circuit the current leads the voltage by 30°. The power dissipated in the LCR circuit is

An LCR series with R = 100Ω is connected to a 200 V, 50 Hz ac source when only the capacitance is removed, the current leads the voltage by 60°. When only the inductance is removed, the current leads the voltage by 60°. The current in the circuit is

In an ac series circuit, the instantaneous current is maximum when the instantaneous voltage is maximum. The circuit element connected to the source will be

For series LCR circuit, wrong statement is

In a purely resistive ac circuit, the current

Two identical incandescent light bulbs are connected as show in figure. When the circuit is an ac voltage source of frequency f, which of the following observations will be correct

An LCR circuit contains R = 50 Ω, L =1 mH and C = 0.1μF. The impedance of the circuit will be minimum for a frequency of

A capacitor and an inductance coil are connected in separate ac circuits with a bulb glowing in both the circuits. The bulb glows more brightly when