Alternating Cur...

If the rms current through a $$6.8 k \Omega$$ resistor is $$8 mA$$, the rms voltage drop across the resistor is

An L-C-R circuit contains $$R=50\Omega $$, $$L=1 mH$$ and $$C=0.1\mu F$$. The impedence of the circuit will be minimum for a frequency of

The natural frequency of the circuit shown in adjoining figure is

The value of alternating emf $$E$$ in the given circuit will be

If L-R circuit connected to a battery of constant emf $$E$$ switch $$S$$ is closed at time $$t=0$$. If $$e$$ denotes the induced emf across inductor and $$I$$ the current in the circuit at any time $$t$$. Then which of the following graphs shows the variation of $$e$$ with $$I$$?

In L-C-R circuit, $$f=\dfrac { 50 }{ \pi  } Hz$$, $$V=50 V$$, $$R=300\Omega$$. If $$L=1H$$ and $$C=20\mu C$$, then the voltage across capacitor is :

A coil of inductive reactance $${ 1 }/{ \sqrt { 3 }  }\Omega$$ and resistance $$ 1\Omega $$ is connected to $$200 V$$, $$50 Hz$$ A.C. supply. The time lag between maximum voltage and current is

In the adjoining circuit, if the reading of voltmeter $$V_1$$ and $$V_2$$ are 300 volts each, then the reading voltmeter $$V_3$$ and ammeter A are respectively

An inductive coil has a resistance of 100 When an AC signal of frequency 1000 Hz is applied to the coil, the voltage leads the current by $$45^o$$. The inductance of the coil is 

The instantaneous values of current and voltage in an AC circuit are $$i=100\sin 314 t$$ amp and $$e=200\sin (314t+\dfrac{\pi}{3})V$$ respectively. If the resistance is $$1\Omega$$, then the reactance of the circuit will be: