Embibe Experts Solutions for Chapter: Electricity, Exercise 1: Exercise 1

Which of the following is a good conductor of electricity?

The joule/coulomb is equivalent to

Which of these particles are responsible for the flow of electric current?

The ampere is the SI unit of 

The potential difference across a $4 \mathrm{\Omega }$ resistor is $12 \mathrm{V}$. The current flowing in the conductor is

The unit of resistivity is

The amount of heat produced in a conductor is
(a) directly proportional to the square of the current flowing through the conductor.
(b) directly proportional to the resistance of the conductor.
(c) directly proportional to the time for which the current flows through the conductor.
This is known as Joule's law of heating and it can be mathematically represented as:
$H=I^{2}Rt$
where the symbols have their usual meanings.
If the current is passed through the conductor for double the time, the heat generated will become

The current through a $60 \mathrm{W}$ bulb rated for $250 \mathrm{V}$ is -