The amount of $2 \ A$ electric current is passed for $1 \ minute$ through a conducting wire. How much total electric charge will pass through this wire (in $C$)?

$A$ wire of length $L$ and resistance $R$ is stretched so that the length is doubled and area of cross-section is halved. How will its
$(a)$ resistance change?
$(b)$ resistivity change?

State the factors on which the resistance of a cylindrical conductor depends. How will the resistance of a conductor change if it is stretched so that its length is doubled?

What is the minimum resistance which can be made using five resistors each of $1/5\,\Omega$?

Find the resistance of a bulb rated as $100 \, W - 250 \, V$.

Find the number of electrons transferred between two points kept at a potential difference of $20 \ V$ if $40 \ J$ of work is done.