Jamb Physics 2019 Past Questions and Answers

Question 36:

• JAMB 2019

During the transformation of matter from the solid to the liquid state, the heat supplied does not produce a temperature increase because

A. The heat energy is quickly conducted away
B. The heat capacity has become very large as the substance melts
C. The heat gained is equal to the heat lost by the substance
D. All the heat is used to break the bonds holding the molecules of the solid together

Question 37:

• JAMB 2019

The statement 'Heat lost by the hot body equals that gained by the cold one' is assumed when determining specific that heat capacity by the method of mixtures. Which of the following validates the assumption?
I. Lagging the Calorimeter
II. Ensuring that only S.I units are used
III. Weighing the calorimeter, the lid and the stirrer.

A. I only
B. I & II only
C. I & III only
D. II & III only

Question 38:

• JAMB 2019

In the molecular explanation of conduction, heat is transferred by the

A. Free electrons
B. Free atoms
C. Free molecules
D. Free solids

Question 39:

• JAMB 2019

The conductivity of gases at low pressure can be termed as
I. hot cathode emission
II. thermo ionic emission
III. cold cathode emission
IV. Field emission

A. I & II
B. II & III
C. III & IV
D. IV & V

Question 40:

• JAMB 2019

Which of the following media allow the transmission of sound waves through them?
I. air
II. liquid
III. solids


A. I & II only
B. I & III only
C. II & III only
D. I, II & III