Embibe Experts Solutions for Chapter: Alternating Current, Exercise 1: KCET (UG) 2019

Which of the following represents the variation of inductive reactance $\left(X_L\right)$ with the frequency of voltage source $\left(\nu \right)?$

A $100 \mathrm{W}$ bulb is connected to an $\mathrm{AC}$ source of $220 \mathrm{V},50 \mathrm{Hz}$. Then the current flowing through the bulb is

In Karnataka, the normal domestic $\text{AC}$ power supply is rated as $220 \mathrm{V}$, $50 \mathrm{Hz}$. Here $220 \mathrm{V}$ and $50 \mathrm{Hz}$ refer to:

In the given circuit, the resonant frequency is

What will be the reading in the voltmeter and ammeter of the circuit shown?

The power factor of $R-L$ circuit is $\frac{1}{\sqrt{3}}$. If the inductive reactance is $2\mathrm{\Omega }$. The value of resistance is

In the series $\mathrm{LCR}$ circuit, the power dissipation is through:

A step-up transformer operates on a  $230 \mathrm{V}$ line and a load current of $2 \mathrm{A}$. The ratio of primary and secondary windings is $1: 25$ . Then the current in the primary is