Elasticity Test...

A steel wire is fixed at its one end on the roof. At other ends of the wire, 1 kg mass is hanged so that the energy stored in the wire is E. The energy stored in the same wire if we hang 2 kg mass instead of 1 kg is:

Three identical balls of rubber, aluminium, and steel are dropped from the same height on a horizontal rigid surface. If V_rubber V_Al, and V_steel are their speeds just after the collision, then

The breaking strength of the iron wire of radius r and length l is 2 x 10⁶ N/m². Breaking strength of another iron wire of radius r, and length l at the same temperature will be:

Which of the following has the greatest elasticity?

Compressed rubber ball has:

The diagrams represent the potential energy U as a function of interatomic separation r. Which of the following diagrams corresponds to stable molecules found in nature?

In the following questions, a statement of assertion (A) is followed by a statement of the reason (R).

A: Steel is more elastic than rubber.

R: Deformation in steel is less than rubber for equal forces.

In the following questions, a statement of assertion (A) is followed by a statement of the reason (R)

A: Air is more elastic than iron.

R: Elasticity is directly proportional to Bulk modulus and the Bulk modulus of air is more than that of steel

In the following questions, a statement of assertion (A) is followed by a statement of the reason (R)

A: Almost for all metals, the modulus of elasticity decreases with a rise in temperature.

R: By increasing temperature, the intermolecular force decreases.

A wire of length L, area of cross section A is hanging from a fixed support. The length of the wire changes to L₁ when mass M is suspended from its free end. The expression for Young's modulus is: