Home
Class 12
PHYSICS
Assertion : Stress is the internal for...

Assertion : Stress is the internal force per unit area of a body.
Reason : Rubber is less elastic than steel.

A

If both the assertion and reason are true and reason is correct explanation of the assertion .

B

If both the assertion and reason are true but reason is not a correct explanation of the assertion .

C

If the assertion is true but the reason is false.

D

If both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
B

Stress is the internal force per unit area of a body. If the same force is applied to the rubber and steel, then strain in rubber is more. IT measn the rubber is more elastic than steel.
Promotional Banner

Similar Questions

Explore conceptually related problems

A: Strain is a dimensionless quantity, R: Strain is internal force per unit area of a body

Assertion are conformers. Reason:- First is less stable than second.

Assertion (A): Potassium is a stronger reducing agent than sodium. Reason (R ): IE of potassium is less than that of sodium.

Assertion: The stress-strain behaviour varies from material to material. Reason: A rubber can be pulled to several time its original length and still returns to its origin shape.

Assertion : Wave number is the number of waves per units length. Reason : Wave number =(1)/(lambda) .

Assertion: Static frictional force is a self adjusting force. Reason: Force of static friction does not depend upon the mass of the body.

Assertion (A) : EA of O is less than that of F but greater than that of N . Reason (R ): IE is as follows: N gt O gt F .

Assertion : Even though net external force on a body is zero, momentum need not be conserved. Reason : The internal interaction between particles of a body cancels out momentum of each other

The internal restoring force acting per unit area of cross-section of the deformed body is called

The property of a body by virtue of which it tends to regain its original configuration as soon as the deforming forces applied on the body are removed is called elasticity. Coefficient of elasticity, E = (stress)/("strain") = (F//a)/(Delta l//l) = (F l)/(pi r^2(Delta l)) The value of E depends upon nature of material. A material with higher value of E is said to be more elastic. Read the above passage and answer the following question : (i) Which is more elastic steel or rubber ? Why ?