CBSE 2022 · Region 2 · Set 1 · Q12

(a)

List the factors on which the resistance of a uniform cylindrical conductor of a given material depends.

(b)OR(a)

The resistance of a wire of $\displaystyle 0.01$ cm radius is $\displaystyle 10 \Omega$. If the resistivity of the wire is $\displaystyle 50 \times 10^{-8} \Omega \mathrm{~m}$, find the length of this wire.

(b)

An electric kettle of $\displaystyle 2$ kW is used for $\displaystyle 2$ h . Calculate the energy consumed in

(i)

kilowatt hour and

(ii)

joules.