The resistivity of wire made up of copper having length `L` and radius ` r` is ` x`.If another wire made up of same material but length `2L` and radius `(r)/(2) ` then its resistivity will be

When a wire is stretched and its radius becomes r//2 then its resistance will be

The resistance of a wire of uniform diameter d and length L is R . The resistance of another wire of the same material but diameter 2d and length 4L will be

A wire of length L and radius r is clamped at one end. On stretching the other end of the wire with a force F, the increase in its length is 1. If another wire of same material but of length 2L and radius 2r is stretched with a force 2F, the increase in its leagth will be

A wire of length L and radius a rigidlyl fixed at one end. On stretching the other end of the wire with a force F, the increase in its length is L, if another wire of same material but of length 2 L and radius 2 a is stretched with a force 2 F, the increase in its length will be

A cylindrical wire of length L and radius r has a resistance R. The resistance of another wire of the same material but half its length and half its radius will be:

The resistance of a wire is 10 ohm. The resistance of a wire whose length is twice and the radius is half, if it is made of same material is

If breaking stress of a wire of length L and radius of cross-section r is P N//m^(2) , then breaking stress of wire of same material of length 2 L and radius of cross section (r/2) will be

A wire of initial length L and radius r is stretched by a length l. Another wire of same material but with initial length 2L and radius 2r is stretched by a length 2l. The ratio of the stored elastic energy per unit volume in the first and second wire is?

The young's modulus of a wire of length (L) and radius (r ) is Y. If the length is reduced to L/2 and radius r/2 , then its young's modulus will be