Elasticity - Jamb Physics Past Questions and Answers

Question 1:

• JAMB 1978

A piece of rubber 10cm long stretches 6mm when a load of 100N is hung from it. What is the strain?

A. 60
B. 6
C. 6 x 10^-2
D. 6 x 10^-3
E. 0.6

Question 2:

• JAMB 1981

The extension in a spring when 5g wt was hung from it was 0.56cm. If Hooke's law is obeyed, What is the extension caused by a load of 20g wt?

A. 1.12m
B. 2.14cm
C. 2.52cm
D. 2.80cm
E. 2.24cm

Question 3:

• JAMB 1982

The point beyond which a stretched spring does not return to its original length is called the

A. Breaking point
B. Elastic limit
C. Spring constant
D. Elasticity point
E. Release point

Question 4:

• JAMB 1982

The point beyond which a stretched spring does not return to its original length is called the

A. Breaking point
B. Elastic limit
C. Spring constant
D. Elasticity point
E. Release point

Question 5:

• JAMB 1982

A 10g mass placed on the pan of a spring balance causes an extension of 5cm. If a 15g mass is placed on the pan of the same spring balance, the extension is

A. 3.3cm
B. 6.5cm
C. 7.5cm
D. 10.8cm
E. 15.0cm