Jamb Physics 2006 Past Questions and Answers

Question 6:

• JAMB 2006

An immersion heater rated 2.0A, 240V is used to boil water from temperature 52°c to 100°c. If the mass of the water is 2.5kg. determine the time taken to boil the water.
[specific heat capacity of water = 4.2 x 10³ jkg^-1 k^-1]

A. 1.05 x 10³s
B. 1.05 x 10⁵s
C. 1.05 x 10²s
D. 1.05 x 10⁴s

Question 7:

• JAMB 2006

The thermos flask is designed to?

A. Prevent heat loss or gain by conduction, convection amd radiation
B. Store hot tea or water
C. Prevent heat gain by conduction, convection and radiation
D. Prevent head lost conduction, convention and radiation

Question 8:

• JAMB 2006

what is likely to happen if the glass of a thermometer expands more upon heating than the liquid inside?

A. The glass will break
B. The glass will shrink
C. The liquid will rise up in the stem
D. The liquid will go down in the stem

Question 9:

• JAMB 2006

A drop of petrol makes a finger colder than a drop of water would because?

A. Petrol takes its latent heat of veporization from the finger
B. Petrol takes its latent heat of fusion from the finger
C. Water is more viscious than petrol
D. Water has higher surface tension dan petrol

Question 10:

• JAMB 2006

A cell of internal resistance r is connected to an external resistor R. The conductor for maximum power transfer is?

A. R < r
B. R = r
C. R = 2r
D. R > r