Question 166:

• JAMB 1981

Which of the following is NOT an effect that can be produced by an electric current?

A. Heat
B. Light
C. Sound
D. Motion
E. None of the above

Question 167:

• JAMB 1981

A cell of e.m.f 2V and internal resistance 1\(\Omega\) supplies a current of 0.5 amps to a resistance whose value is

A. 0.5\(\Omega\)
B. 1\(\Omega\)
C. 2\(\Omega\)
D. 2.5\(\Omega\)
E. 3\(\Omega\)

Question 168:

• JAMB 1981

An example of a scalar quantity is

A. Velocity
B. Weight
C. Electric charge
D. Acceleration due to gravity
E. Momentum

Question 169:

• JAMB 1981

Heat was supplied to a block of ice at 0^oC until half of it melted. Which of the following statements is true?

A. The temperature rises and the ice expand
B. The temperature remains constant and the volume of the ice decreases
C. The ice gives out heat as it melts and the temperature decreases
D. The mass remains constant and the temperature increases
E. The temperature decreases because some heat is lost

Question 170:

• JAMB 1981

When a ray of light passes from water to glass, it is

A. Bent away from the normal
B. Bent towards the normal
C. Totally internally reflected
D. Absorbed by the glass
E. Broken into a pure spectrum