Alternating Cur...

The adjoining figure shows an $$AC$$ circuit with resistance $$R$$, inductance $$L$$ and source voltage $$V_s$$. Then

In series $$L-C-R$$ circuit voltage drop across resistance is $$8V$$, across inductor is $$6V$$ and across capacitor is $$12V$$. Then

An $$AC$$ voltage is applied across a series combination of $$L$$ and $$R$$. If the voltage drop across the resistor and inductor are $$20V$$ and $$15V$$ respectively, then applied peak voltage is :

In the circuit shown in figure, the $$AC$$ source gives a voltage $$V=20\cos (2000t)$$. Neglecting source resistance, the voltmeter and ammeter readings will be

When $$100\space V$$ dc is applied across a solenoid, a current of $$1.0\space A$$ flows in it. When $$100\space V$$ ac is applied across the same coil, the current drops to $$0.5\space A$$. If the frequency of the ac source is $$50\space Hz$$, the impedance and inductance of the solenoid are

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

In a series $$LC$$ circuit, the applied voltage is $$V_0$$. If $$\omega$$ is very low, then the voltage drop across the inductor $$V_L$$ and capacitor $$V_C$$ are

An $$AC$$ voltage source $$V=V_0\sin \omega t$$ is connected across resistance $$R$$ and capacitance $$C$$ as shown in the figure. It is given that $$R=1/\omega C$$ and the peak current is $$I_0$$. If the angular frequency of the voltage source is changed to $$\omega/\sqrt 3$$ then the new peak current in the circuit is

A coil has an inductance of $$0.7\space H$$ and is joined in series with a resistance of $$220\Omega$$. When an alternating emf of $$220\space V$$ at $$50\space cps$$ is applied to it, then the wattless component of the current in the circuit is (take $$0.7\pi = 2.2)$$

A resistor and an inductor are connected to an ac supply of $$120\space V$$ and $$50\space Hz$$. The current in the circuit is $$3\space A$$. If the power consumed in the circuit is $$108\space W$$, then the resistance in the circuit is