Jamb Physics 2000 Past Questions and Answers

Question 16:

• JAMB 2000

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 17:

• JAMB 2000

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 18:

• JAMB 2000

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

Question 19:

• JAMB 2000

The main reason for making the cover of a vacuum flask airtight is to prevent heat loss by

A. Convection
B. Conduction
C. Radiation
D. Evaporation

Question 20:

• JAMB 2000

A radio is operated by eight cells each of e.m.f. 2.0V connected in series. If two of the cells are wrongly connected, the net e.m.f. of the radio is

A. 8V
B. 10V
C. 12V
D. 16V