Lakhmir Singh and Manjit Kaur Solutions for Chapter: Electricity, Exercise 14: Multiple Choice Questions (MCQs)

A car headlight bulb working on a $12 \mathrm{V}$ car battery draws a current of $0.5 \mathrm{A}$. The resistance of the light bulb is:

An electrical appliance has a resistance of $25 \mathrm{\Omega }$. When this electrical appliance is connected to a $230 \mathrm{V}$ supply line, the current passing through it will be:

When a $4 \mathrm{\Omega }$ resistor is connected across the terminals of a $12 \mathrm{V}$ battery, the number of coulombs passing through the resistor per second is:

Ohm’s law gives a relationship between:

The unit of electrical resistance is:

The substance having infinitely high electrical resistance is called:

Keeping the potential difference constant, the resistance of a circuit is doubled. The current will become:

Keeping the p.d. constant, the resistance of a circuit is halved. The current will become: