How does the resistance of a wire vary with its:
(a) area of cross-section?
(b) diameter?

How does the resistance of a wire depend on its length ?

The resistance of wire of length l and area of cross-section a is x ohm. If the wire is stretched to double its length, its resistance would become:

Two wires A and B are of equal lengths, different cross-sectional areas and made of the same metal. (a) (i) Name the property which is same for both the wires. (ii) Name the property which is the different for both the wires (b) I fthe resistance of wire A is four times the resistance of wire B , calculate (i) the ratio of the cross-sectional area of the wires. (ii) the ratio of the radii of the wires.

How does the resistance of a conductor depend on: (a) length of the conductor? (b) area of cross-section of the conductor? (c) temperature of the conductor?

The resistance of a wire of length 80 cm and of uniform area of cross-section 0.025 cm^2 , is found to be 1.50 ohm. Calculate the resistivity of the wire.

If the resistivity of a potentiometer wire be rho and area of cross-section be A , then what will be potential gradient along the wire