Alternating Cur...

A coil of inductance $$300\ mH$$ and resistance $$2\Omega$$ is connected to a source of voltage $$2V$$. The current reaches half of its steady state value in

For the circuit shown in Fig. the voltage of the source at any instant is equal to 

In the given figure, which voltmeter will read zero voltage at resonant frequency $$\omega$$ rad/sec?

A $$100\ volt$$ $$AC$$ source of angular frequancy $$500\ rad/s$$ is connected to a $$LCR$$ circuit with $$L=0.8\ H$$, $$C=5\ \mu F$$ and $$R=10\Omega$$, all connected in series. The potential difference across the resistance is 

The instantaneous voltages at three terminals marked X,Y and Z are given by
$$V_x=V_0\sin { \omega t } ,$$
$$V_x=V_0\sin { \sin { \left( \omega t+\dfrac { 2\pi  }{ 3 }  \right)  } } $$ and
$$V_x=V_0\sin { \sin { \left( \omega t+\dfrac { 4\pi  }{ 3 }  \right)  } } $$
An ideal voltmeter is configured to read rms value of the potential difference between its terminal. It is connected between points X and Y and then between Y and Z. The reading(s) of the voltmeter will be

When $$100\ V\ d.c.$$ flows in a solenoid, the steady state current is $$10\ A$$. When $$100-V.\ ac$$. flows, the current drops to $$0.5\ A$$. If the frequency of ac. be $$50\ Hz$$, then the impedance and the inductance of the solenoid are.

In a series  L-C-R circuit the voltage across the resistance , capacitance and inductance is 10 V each. If capacitance is short circuited, the voltage across the inductance will be:

In the circuit shown in figure when the frequency of oscillator in increase, the reading of ammeter $${A}_{4}$$ is same as that of ammeter:

An inductor of reactance $$X_L=4\Omega$$ and resistor of resistance $$R=3\Omega$$ are connected in series with a voltage source of emf $$\varepsilon =(20V)[\sin (100\pi rad/s)t]$$. The current in the circuit at any time t will be?

In the given circuit find the ratio of $$i_{1}$$ to $$i_{2}$$. Where $$i_{1}$$ is the initial (at $$t = 0)$$ current, and $$i_{2}$$ is steady state (at $$t = \infty)$$ current through the battery.