Embibe Experts Solutions for Chapter: Alternating Current, Exercise 1: Exercise-1

In $\mathrm{LCR}$ circuit, the voltage across the terminals of a resistance and current will be

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

In the circuit, shown in the figure, the $\mathrm{A}.\mathrm{C}.$ source gives a voltage $V=20 \cos \left(2000 \mathrm{t}\right)$ volt neglecting source resistance, the voltmeter and ammeter reading will be

A coil has an inductance of $0.7$ henry and is joined in series with a resistance of $220 \mathrm{\Omega }$. When the alternating emf of $200 \mathrm{V}$ at $50 \mathrm{Hz}$ is applied to it then the phase through which current lags behind the applied emf and the wattless component of maximum current in the circuit will bee respectively

The current $I$, potential difference $V_L$ across the inductor and potential difference $V_C$ across the capacitor in circuit as shown in the figure are best represented vectorially as

In a series $\mathrm{CR}$ circuit shown in figure, the applied voltage is $10 \mathrm{V}$ and voltage across capacitor is found to be $8 \mathrm{V}$, then the voltage across $R$, and the phase difference between current and the applied voltage will respectively be

In series $\mathrm{LR}$ circuit $X_L=3R$ and $R$ is resistance. Now a capacitor with $X_C=R$ is added in series. Ration of new to old power factor is

The voltage-time $\left(V-t\right)$ graph for the triangle wave has a peak value. $V_0$ is as shown in the figure:

The $\mathrm{rms}$ value of $V$ in time interval from $t=0$ to $\frac{T}{4}$ is