Mechanical Prop...

If the interatomic spacing in a steel wire is $$2.8\times 10^{-10}m$$ and $$Y_{real}=2\times 10^{11}N/m^{2}$$, then force constant in N/m is -

One end of uniform wire of length $$L$$ and of weight $$W$$ is attached rigidly to a point in the roof and a weight $$W_{1}$$ is suspended from its lower end. If $$s$$ is the area of cross section of the wire, the stress in the wire at a height $$(3L/4)$$ from its lower end is

A material has Poisson's ratio $$0.5$$. If a uniform rod of it suffers a longitudinal strain of $$3\times 10^{-3}$$, what will be percentage increase in volume?

A rod of length $$3$$ in and uniform cross-section area $$1mm^{2}$$ is subjected by four forces at different cross section as shown in the figure. Yungs modulus of the rod is

A rod of uniform cross sectional area $$A$$ and length $$L$$ has a weight $$W$$. It is suspended vertically from a fixed support vertically from a fixed support. If Young's modulus for rod is $$Y$$, then elongation produced in rod is

Length of wire becomes 16 cm when certain tension is applied. If the tension is now doubled then wire is further elongated by 1 cm then original length of wire is

To apply a maximum stress of $$1.2\times10^8N/m^2$$ under the action of force $$40N$$ the minimum radius of wire required is

A brass bar, having cross sectional area 10 $$cm^2$$ is subjected to axial forces as shown in figure. Total elongation of the bar is (Take Y = $$8 \times 10^2 \ t/m^2$$).

In a Young's double slit experiment, the intensity at the cetral maximum is $$l_{0-}$$. The intensity ata distance $$\beta/4$$ from the central maximum is ($$\beta $$is frige width)

In Searle's apparatus we have two wires. During experiment we study the extension in one wire. The use of second wire is-