Jamb Physics 2012 Past Questions and Answers

Question 46:

• JAMB 2012

A rope is being used to pull a mass of 10kg vertically upward. Determine the tension in the rope if, starting from rest, the mass acquires a velocity of 4ms\(^{-1}\) in 8s [g = 10ms\(^{-2}\)]

A. 5N
B. 50N
C. 95N
D. 105N

Question 47:

• JAMB 2012

I. The frictional force is independent of the area of the surfaces in conduct
II. The frictional force depends on the nature of the surfaces in contact
III. The frictional force depends on the speed of sliding
IV. The frictional force is directly proportional to the normal reaction.
Which combination of the above is true of sliding friction?

A. I, III and IV
B. I, II and IV
C. I, II and III
D. II, III and IV

Question 48:

• JAMB 2012

Total internal reflection occurs when light moves from

A. A dense medium to a less dense medium
B. Air to water
C. Water to glass
D. A less dense to a dense medium

Question 49:

• JAMB 2012

A quantity of water at 0°C is heated to about 30°C. At each degree rise in temperature, its density will

A. Rise steadily
B. Fall steadily
C. Fall then rise
D. Rise then fall

Question 50:

• JAMB 2012

I. Coherence
II. Same frequency
III. Same wavelength
IV. Same Intensity
Which of the conditions above are necessary to produce interference fringes?

A. I and III
B. I, II and IV
C. I, II and III
D. II and III