Quantity of Heat - Jamb Physics Past Questions and Answers

Question 1:

• JAMB 1978

A potential difference of 6v is used to produce a current of 5A for 200s through a heating coil. The heat produced is

A. 4800 cal
B. 6000 cal
C. 2400J
D. 240k cal
E. 6000J

Question 2:

• JAMB 1980

In the study of physics, temperature and heat are often confused with each other. Which of the following statements correctly defines these two element?

A. Temperature is a measure of the average kinetic energy of the molecules of a substance
B. Heat is a measure of the total kinetic energy of the molecules in a system
C. Different materials require different amounts of heat to cause a given change in temperature
D. All of the above
E. A and B only

Question 3:

• JAMB 1985

Two liquids, P at a temperature of 20^oC and Q at a temperature of 80^oC have specific heat capacities of 1.0Jkg^-1oC^-1 and 1.5J kg^-1oC^-1respectively. if equal masses of P and Q are mixed in a lagged calorimeter, then the equilibrium temperature is

A. 44^oC
B. 50^oC
C. 56^oC
D. 60^oC
E. 70^oC

Question 4:

• JAMB 1985

A good calorimeter should be of

A. Low specific heat capacity and low heat conductivity
B. Low specific heat capacity and high heat conductivity
C. High specific heat capacity and low heat conductivity
D. High specific heat capacity and low heat conductivity
E. Dull surface and low heat conductivity

Question 5:

• JAMB 1986

When two objects P and Q are supplied with the same quantity of heat, the temperature change in P is observed to be twice that of Q. The ratio of the specific heat capacity of P to Q is

A. 1 : 4
B. 4 : 1
C. 1 : 1
D. 2 : 1