A wire stretched a certain amount under a load. If the load and diameter are both increased to three times, find the stretched caused in the wire.

A wire stretches by a certain amount under a load. If the load and radius both increased to four times, find the streatch caused in the wire.

A sitar wire is replaced by another wire of same length and material but of three times the earlier radius.If the tension in the wire remains the same,by what factor will the frequency change?

Two wires are made of the same metal .The length of teh first wire is half that of the second wire and its diameter is double that of the second wire.If equal loads are applied on both wires,find the ratio of increase in their lengths.

The electric resistance of a certain wire of ron is R. If its length and radius are both doubled, then

A rectangular loop of wire of size 4 cm xx 10 cm carries a steady current of 2A. A straight long wire carrying 5A current is kept near the loop If the loop and the wire are coplanar, find (i) the torque acting on the loop and (ii) the magnitude and direction of the force on the loop due to the current carrying wire(fig).

A wire of length l and cross selection area a is made of material of Young's modulus Y.If the wire is stretched by an amount x,find the work done.

A copper wire 36m long with diameter 2 mm is melted to form a sphere. Find the radius of the sphere.

A copper wire 3 mm in diameter is wound about a cylinder whose length is 12 cm, and diameter 10 cm,so as to cover the curved surface of the cylinder. Find the length and mass of the wire, assuming the density of copper to 8.88 g per cm^3 .