Questions in Current Electricity

Select	Question
	The resistance of a wire is 20 ohms. It is so stretched that the length becomes three times, then the new resistance of the wire will be
	The resistivity of a wire
	Ohm's law is true
	The example for non-ohmic resistance is
	Drift velocity ${v_d}$ varies with the intensity of electric field as per the relation
	On increasing the temperature of a conductor, its resistance increases because
	In a conductor 4 coulombs of charge flows for 2 seconds. The value of electric current will be
	The specific resistance of a wire is $\rho$, its volume is 3${m^3}$ and its resistance is 3 ohms, then its length will be
	$62.5 \times {10^{18}}$ electrons per second are flowing through a wire of area of cross-section $0.1{m^2}$, the value of current flowing will be
	A piece of wire of resistance 4 ohms is bent through $180^\circ$ at its mid point and the two halves are twisted together, then the resistance is