Jamb Physics 1995 Past Questions and Answers

Question 26:

• JAMB 1995

Total eclipse of the sun occurs when the

A. Earth is between the moon and the sun
B. Sun is between the moon and the earth
C. Moon is between the sun and the earth
D. Ozone layer is threatened

Question 27:

• JAMB 1995

What is the approximate critical angle for total internal reflection for diamond if the refractive index of diamond is 2.42?

A. 21^o
B. 22^o
C. 23^o
D. 24^o

Question 28:

• JAMB 1995

A real object is placed at a distance ucm in front of a curved mirror of focal length fcm. If the image is upright and magnified, then the mirror is

A. Convex and u =2f
B. Concave and u = 2f
C. Convex and u = f
D. Concave and u = f

Question 29:

• JAMB 1995

Which of the following pairs of colours gives the widest separation in the spectrum of white light?

A. Red and Violet
B. Green and Yellow
C. Red and Indigo
D. Yellow and Violet

Question 30:

• JAMB 1995

Two parallel plates at a distance of 8.0 x 10^-3m apart are maintained at a p.d of 600 volts with the negative plate earthed. What is the electric field strength?

A. 4.8 Vm^-1
B. 75.0Vm^-1
C. 4800.0Vm^-1
D. 75000.0Vm^-1