Jamb Physics 2012 Past Questions and Answers

Question 51:

• JAMB 2012

A boy observes a piece of stone at the bottom of a river 6.0m deep. If he looks from the surface of the river, what is the apparent distance of the stone from him? [Refractive Index of Water = 4/3]

A. 8.0m
B. 5.5m
C. 5.0m
D. 4.5m

Question 52:

• JAMB 2012

A thin wire with heavy weights attached to both ends is hung over a block of ice resting on two supports. If the wire cuts through the ice block while the block remains solid behind the wire, the process is called

A. Condensation
B. Sublimation
C. Regelation
D. Fusion

Question 53:

• JAMB 2012

Dry
Day 1 - 30°C | Day 2 - 29°C | Day 3 - 25°C
Wet
Day 1 - 22°C | Day 2 - 22°C | Day 3 - 21°C
The reading above are for three consecutive days from a wet and dry bulb hygrometer. It can be concluded that the relative humidity for the three days

A. Decreased steadily
B. Remained unchanged
C. Increased steadily
D. Was least on Day 1

Question 54:

• JAMB 2012

One end of a long wire is fixed while a vibrator is attached to the other end. When the vibrator is energized, the types of waves generated in the wire are

A. Stationary and longitudinal
B. Stationary and transverse
C. Progressive and transverse
D. Progressive and longitudinal

Question 55:

• JAMB 2012

A metal of mass 0.5kg is heated to 100°C and then transferred to a well-lagged calorimeter of heat capacity 80JK^-1 containing water of heat capacity 420JK^-1 at 15°C. If the final steady temperature of the mixture is 25°C, find the specific heat capacity of the metal.

A. 877Jkg^-1K^-1
B. 286Jkg^-1K^-1
C. 133Jkg^-1K^-1
D. 92Jkg^-1K^-1