Waec Physics 1996 Past Questions and Answers

Question 26:

• WAEC 1996

In which of the following media would sound waves travel fastest?

A. Kerosine
B. Alcohol
C. Water
D. Lron
E. Air

Question 27:

• WAEC 1996

A ray of light strikes a plane mirror at a glancing angle of 50^o. Calculate the angle between the incident and reflected rays

A. 20^o
B. 40^o
C. 50^o
D. 80^o
E. 100^o.

Question 28:

• WAEC 1996

A boy walks away from a plane mirror at a speed of 3 ms-1 in a direction normal to the surface of the mirror. At what speed is his image approaching him?

A. 8 9.0ms^-1
B. 6.0ms^-1
C. 4.5ms^-1
D. 1.5ms^-1
E. 0.0ms^-1

Question 29:

• WAEC 1996

The graph above shows the relationship between sin i and sin r for a ray of light in air incident on a liquid surface. If i and r are respectively angles of incidence and refraction, deduce the refractive index of the liquid from the graph

A. 1.63
B. 1.50
C. 1.33
D. 1.25
E. 0.08

Question 30:

• WAEC 1996

When a ray of light is incident normally on an air- glass interface, its angle of refraction is

A. 0^o
B. 42^o
C. 45^o
D. 60^o
E. 90^o.