Chap#16 Physics of Solids

Question 1

The dimensional formula for the modulus of elasticity is same as that for:

Answer 1

Stress

Question 2

Which of the modulus of elasticity is involved in compressing a rod to decrease its length?

Answer 2

Young’s Modulus

Question 3

Steel is preferred for making springs over copper. Why?

Answer 3

Young’s modulus of steel is more than that of copper

Question 4

The modulus of rigidity of a liquid is:

Answer 4

Zero

Question 5

How does Young’s modulus vary with the increase in temperature?

Answer 5

Deccrease

Question 6

A wire is stretched to double of its length. The strain is:

Answer 6

1

Question 7

According to Hooke’s law the force required to change the length of a wire by ‘l’ is proportional to:

Answer 7

I

Question 8

For obtaining appreciable extension, the wire should be:

Answer 8

Long and thin

Question 9

A cable that can support a load W is cut into two equal parts. The maximum load that can be supported by ether part is:

Answer 9

W

Question 10

A cable breaks if stretched by more than 2 mm. It is cut into two equal parts. How much either part can be stretched without breaking?

Answer 10

1 mm