Alternating Cur...

An inductor (L = 20 H), a resistor (R = 100 $$\Omega$$) and a battery (E = 10 V) are connected in series. After a long time, the circuit is short-circuited and then the battery is disconnected. Find the current in the circuit at 1 ms after short circuiting.

In a series RLC circuit that is operating above the resonant frequency, the current

If a capacitance C is connected in series with an inductor of inductance L, then the angular frequency will be

A resistor of $$3 k \Omega$$, a $$0.05 \mu F$$ capacitor and a $$120 mH$$ coil are in series across a $$5 kHz, 20 V$$ ac source.What is the impedance, expressed in polar form?

A $$12 \Omega$$  resistor, a $$40 \mu F$$ capacitor, and an $$8 mH$$ coil are in series across an ac source. The resonant frequency is

Which one of the following graphs in following figure represents variation of reactance $$'X_c'$$ of a capacitor with frequency 'f' of an ac supply?

If the value of C in a series RLC circuit is decreased, the resonant frequency

For a certain load, the true power is $$150 W$$ and the reactive power is $$125 W$$. The apparent power is

A $$90 \Omega$$ resistor, a coil with $$30 \Omega$$ of reactance, and a capacitor with $$50 \Omega$$  of reactance are in series across a $$12 V$$ ac source. The current through the resistor is

In a series RC circuit, when the frequency and the resistance are halved, the impedance