Jamb Physics 1980 Past Questions and Answers

Question 11:

• JAMB 1980

which of the following does NOT cause a reduction of the surface tension of water?

A. Soap solution
B. Detergent
C. Alcohol
D. Camphor
E. Grease

Question 12:

• JAMB 1980

The water at the bottom of a waterfall is slightly warmer than that at the top because part of the

A. Potential energy raises the water temperature
B. Water absorbs latent heat from the atmosphere
C. Kinetic energy is changed intyo internal energy
D. Dropping mass of water increases the heat capacity
E. A and C above

Question 13:

• JAMB 1980

a pressure cooker saves both time and fuel in cooking because inside the cooker, the

A. Boiling point of water is raised
B. Pressure is constant
C. Heat is completely trapped
D. Temperature is evenly distributed
E. Volume of steam varies

Question 14:

• JAMB 1980

Which of the following statements is NOT true of the image in a plane mirror? The image is

A. The same size as the object
B. Laterally inverted
C. Virtual
D. Magnified
E. The same distance behind the mirror as the object is in front

Question 15:

• JAMB 1980

Any line or section through an advancing wave in which all the particles are in the same phase is called the

A. Wave lenght
B. Wave crest
C. Wave trough
D. Wave amplitude
E. Wave front