Mechanical Prop...

The length of a wire under stress changes by 0.01%. The strain produced is

Four wires made of same materials are stretched by the same load. Their dimensions are given below. The one which elongates more is ?

A wire of length '$$l$$' and radius '$$r$$' is clamped rigidly at one end. When the other end of the wire is pulled by a force '$$F$$', its length increases by $$'x'$$. Another wire of same material of length '$$2l$$' and radius $$'2r$$' is pulled by a force '$$2F'$$, the increase in its length will be :

The length of a wire is $$4m$$. Its length is increased by $$2mm$$ when a force acts on it. The strain is:

A steel wire of $$2mm$$ in diameter is stretched by applying a force of $$72N$$. Stress in the wire is

The elongation produced in a copper wire of length 2m and diameter 3mm, when a force of 30N is applied is [Y$$=$$1x10$$^{11}$$N.m$$^{-2}$$]

The lengths of two wires of the same material and diameter are $$100 cm$$ and $$125 cm$$. If same force is applied on them, the elongation in the first wire is $$4 mm$$. The elongation in the second wire (in mm) is

The force required to double the length of a steel wire of area of cross-section $$5 \times 10^{-5}  m^{2}$$ (in N) is :
($$Y=20 \times 10^{10}  Pa$$)

The length of two wires are in the ratio $$3 : 4$$.Ratio of the diameters is $$1:2$$; young's modulus of the wires are in the ratio $$3:2$$; If they are subjected to same tensile force, the ratio of the elongation produced is

A solid sphere hung at the lower end of a wire is suspended from a fixed point so as to give an elongation of $$0.4mm$$. When the first solid sphere is replaced by another one made of same material but twice the radius, the new elongation is