In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as
(a) If both assertion and reason are true and reason is the correct explanation of assertion.
(b) If both assertion and reason are true but reason is not the correct explanation of assertion.
(c ) If assertion is true but reason is false.
(d) If assertion and reason are false.
Q. Assertion: Lead is more elastic than rubber.
Reason: if the same load is attached to lead and rubber wires of the same cross-sectional area, the strain of lead is very much less than that of rubber.

Answer

A

Explanation

On applying load on lead and rubber wires of same cross-secion area, the strain produced in lead is much less than rubber wires. Now from the relation,
`Y=`Young's modulus
or `Y=(stress)/(strai n)`
The Young's modulus of elasticity of elasticity is grater for lead wires. Hence, lead is elastic than rubber.