Jamb Physics 2009 Past Questions and Answers

Question 21:

• JAMB 2009

I. Moon.
II. Sun.
III.street light.
IV. stars.
Which of these above is a natural source of light?

A. II, III, and IV only
B. I, II and III only
C. III and IV only
D. II and IV only

Question 22:

• JAMB 2009

An object is placed 5 cm from the pole of a concave mirror. if the focal length of the mirror is 10 cm. what is the image distance?

A. 10 cm in front of the mirror.
B. 5 cm in front of the mirror
C. 10 cm behind the mirror
D. 5 cm behind the mirror

Question 23:

• JAMB 2009

Calculate the position of an object placed in front of a convex mirror having focal length of 12 cm such that an image is formed 6 cm away from the mirror

A. 4. 0 cm
B. 3. 0 cm
C. 12.0 cm
D. 9.0 cm

Question 24:

• JAMB 2009

If the refractive index of crown glass is 1.51, its critical angel is.

A. 48.6°
B. 22.5°
C. 41.5°
D. 45.0°

Question 25:

• JAMB 2009

When light passes through two media x and y of refraction indices 1.51 and 1.33 respectively, the speed of light in

A. X is same as in y
B. X and y is same as in vacuum
C. X is higher than in y
D. Y is higher than in x