Alternating Cur...

An inductive coil has a resistance of $$100\ \Omega$$. When an a.c. signal of frequency $$1000\ Hz$$ is fed to the coil, the applied voltage leads the current by $${45}^{o}$$. What is the inductance of the coil?

In a L-C-R circuit, as the frequency of an alternating current increases the impedance of the circuit

The instantaneous voltage through a device of impedence $$20\Omega$$ is $$e=80\sin { 100\pi t } $$. The effective value of the current is

The impedance of a series $$L-C-R$$ circuit in an $$AC$$ circuit is

In the $$AC$$ network shown in figure, the rms current flowing through the inductor and capacitor are $$0.6A$$ and $$0.8A$$ respectively. Then the current coming out of the source is

For watt-less power in an $$AC$$ circuit the phase angle between the current and voltage is

In a parallel $$L-C-R$$ circuit as shown in figure if $$I_R, I_L, I_C$$ and $$I$$ represents the rms values of current flowing through resistor, inductor, capacitor and the source, then choose the appropriate correct answer

In a series $$L-C-R$$ circuit, current in the circuit is $$11A$$ when the applied voltage is $$220V$$. Voltage across the capacitor is $$200V$$. If value of resistor $$20\Omega$$, then the voltage across the unknown inductor is

In an $$AC$$ circuit, the impedance is $$\sqrt 3$$ times the reactance, then the phase angle is

A circuit contains resistance $$R$$ and an inductance $$L$$ in series. An alternating voltage $$V=V_0\sin \omega t$$ is applied across it. The currents in $$R$$ and $$L$$ respectively will be