Jamb Physics 2010 Past Questions and Answers

Question 71:

• JAMB 2010

The diagram above represents balls in an undulating surface. Which of the following option represents positions of stable equilibrium?

A. III, IV and VIII
B. II, V and VIII
C. III, VI and IX
D. I, IV and VII

Question 72:

• JAMB 2010

A bob of weight 0.1 N hangs from a massless string of length 50 cm. A variable horizontal force which increase from zero is applied to pull the bob until the string makes an angle of 60o with the vertical. The work done is

A. 0.500 J
B. 0.250 J
C. 0.050 J
D. 0.025 J

Question 73:

• JAMB 2010

Two metals P and Q of length l₁ and l₂ are heated through the same temperature difference. If the ratio of the linear expansivities of P to Q is 2:3 and the ratio of lengths is 3:4. What is the ratio of increase in length of P to Q?

A. 7:5
B. 5:7
C. 1:2
D. 2:1

Question 74:

• JAMB 2010

THe velocity of sound in air at 16^oC is 340ms^-1. What will it be when the pressure is doubled and its temperature raised to 127^oC?

A. 400 ms^-1
B. 4,000 ms^-1
C. 8,000 ms^-1
D. 160,000 ms^-1

Question 75:

• JAMB 2010

Three capacitors of capacitance 2μF, 4μFand 8μF are connected in parallel and a P.D of 6V is maintained across each capacitor, the total energy stored is

A. 2.52 x 10^-6J
B. 6.90 x 10^-6J
C. 2.52 x 10^-4J
D. 6.90 x 10^-4J