(a) List the factors on which the resistance of a uniform cylindrical conductor of a given material depends. (b) The resistance of a wire of 0.01 cm…

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

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.

What is the meaning of electric power of an electrical device ? Write its SI unit.

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

kilowatt hour and

joules.