H C Verma Solutions for Chapter: Electricity, Exercise 1: EXERCISES

A heater draws $1100 \mathrm{W}$ at $220 \mathrm{V}$.

Calculate the kilowatt hours consumed in a week if the heater is used daily for four hours at the rated voltage.

A bulb used in a car is rated $12 \mathrm{V}, 48 \mathrm{W}$. Find the energy consumed in one minute when the bulb is connected to

(b) a $6-V$ battery.

A thick wire has a larger resistance than a thin wire.

The resistance of a cylindrical piece of rubber is _____ than that of a similar piece of copper.
(lesser/greater)

The kilowatt hour is the unit of _____. (Power / Energy)

The equivalent resistance of two equal resistances connected in parallel is _____ the value of each resistance.

Three resistors are connected in series with a cell. If the current In each resistor is $2 \mathrm{A}$, then that in the cell will be _____($2\mathrm{A}/4\mathrm{A}/1\mathrm{A}$)

Three identical resistors are connected in parallel with a battery. If the current in each resistor is $2 \mathrm{A}$ that in the battery will be _____ $\mathrm{A}$.