Jamb Physics 2017 Past Questions and Answers

Question 16:

• JAMB 2017

The thermal expansion of a solid is an advantage in

A. Balance wheel of a watch
B. Construction of steel rail lines
C. Construction of large steel bridges
D. Fitting of tyres on wheels

Question 17:

• JAMB 2017

The S.I unit of moment of a force is

A. Kgm
B. µm
C. Jm
D. µm\(^{-1}\)

Question 18:

• JAMB 2017

A block and tackle pulley arrangement has 6 pulleys in which an effort of 50N supports a load of 200N, calculate the efficiency of the machine

A. 80.0%
B. 76.6%
C. 66.7%
D. 60.7%

Question 19:

• JAMB 2017

Calculate the light of the image formed by a pinhole camera of length 12cm used to photograph an object 60cm away from the hole and 70cm high

A. 10 cm
B. 16 cm
C. 5 cm
D. 14 cm

Question 20:

• JAMB 2017

When two objects P and Q are supplied with the same quantity of heat, the temperature change in P is observed to be twice that of Q. The mass of P is half that of Q. The ratio of the specific heat capacity pf P to Q is

A. 1:4
B. 4:1
C. 1:1
D. 2:1