Alternating Cur...

A condenser and a 30 $$\Omega $$ resistance are connected in series. When they are connected to 120V A.C. source then the current flowing in the circuit is 1A The p.d. across the ends of the condenser will be nearly

In the circuit shown in the figure, (neglecting source resistance) the voltmeter and ammeter readings will respectively be

In a series LCR circuit the voltage across resistance, capacitance and inductance is 10 V each. If the capacitance is short circuited, the voltage across the inductance will be

In the following circuit, the potential of source is $$E_0=200$$ volts, $$R=200\Omega$$, $$L=0.1$$ henry, $$C=10.6 $$ farad and frequency is variable, then the current at f=0 and f=$$\infty$$ is :

An LCR series circuit with 100 $$\Omega $$ resistance is connected to an ac source of 200V and of frequency of 300 rad/s. When only the capacitance is removed, the current lags behind the voltage by $$60^{0}$$ . When only the inductance is removed, the current leads the voltage by $$60^{0}$$ the current through the circuit is:

In the given figure as shown, the reading of the ammeter in ampere is

An alternating voltage $$V =200\sqrt{2} \sin{100t}$$, Where $$V$$ is in volt and $$t$$ is in seconds, is connected to a series combination of 1$$\mu\text{F}$$ capacitor and $$10\ \text{k}\Omega $$ resistor through an AC ammeter. The reading of the ammeter will be_____

The capacitor of an oscillatory circuit of negligible resistance is enclosed in a evacuated container. The frequency of the circuit is 150 kHZ and when the container is filled with a gas, the frequency changes by 100 HZ. The dielectric constant of the gas.

In the AC circuit shown, $$X_{L}=7\Omega ,R=4\Omega\ and\ X_{c}=4\Omega .$$ The reading of the ideal voltmeter $$V_{2}\ is\ 8\sqrt{2}$$. The reading of the ideal ammeter will be:

A transistor-oscillator using a resonant circuit with an inductor L (of negligible resistance) and a capacitor C in series produce oscillations of frequency f. If L is doubled and C is changed to 4C, the frequency will be:-