Use of the mirror formula - Jamb Physics Past Questions and Answers

Question 1:

• JAMB 2019

If the time of flight is 96seconds, calculate the horizontal range through the point of projection.

A. 84400m
B. 69000m
C. 61440m
D. 24000m

Question 2:

• JAMB 1979

An object is placed 30cm from a concave mirror of focal length 15cm. the linear magnification of the image produced is

A. O
B. \(\frac{2}{3}\)
C. 1
D. 2
E. 3

Question 3:

• JAMB 1980

If the magnification of a virtual image formed of an object 10cm from a convex lens is 3, then the focal length of the lens is

A. 10cm
B. 15cm
C. 16cm
D. 19cm
E. 20cm

Question 4:

• JAMB 1986

A dentist obtains a linear magnification of 4 of a hole in a tooth by placing a concave mirror at a distance, of 2.0cm from the tooth. The radius of Curvature of the mirror is

A. 5.3cm
B. 3.2cm
C. 2.7cm
D. 1.6cm

Question 5:

• JAMB 1988

To obtain a magnification of 2.5, how far should an object be placed from the pole of a thin converging lens of focal length 10.20m?

A. 0.13m
B. 0.25m
C. 0.28m
D. 0.50m