Post Utme Physics Past Questions and Answers

Question 1026:

Which of the following remain(s) unchanged as light travels from one medium to another?
l. speed
II. Wavelength
III. Frequency

A. I only
B. II only
C. III only
D. I and II only
E. II and III only

Question 1027:

A concave mirror of radius of curvature \(20 cm\) has a pin placed at \(15 cm\) from its pole.
What will be the magnification of the image formed?

A. 4.00
B. 2.00
C. 1.33
D. 1.50
E. 0.25

Question 1028:

The image in a pin-hole camera is always ____________

A. Diminished
B. Enlarged
C. Upright
D. Inverted
E. Blurred

Question 1029:

An object weighs \(10 . ON\) in air and \(7 . ON\) in water.
What is its weight when immersed in a liquid of relative density \(1.5\) ?

A. \(4.50 N\)
B. \(4.67 N\)
C. \(5.50 N\)
D. \(6.67 N\)
E. \(8.50 N\)

Question 1030:

A converging lens of focal length \(5 cm\) forms a virtual image which is \(10 cm\) from the lens.
How far from the lens is the object?

A. \(2.0 cm\)
B. \(3.3 cm\)
C. \(5.0 cm\)
D. \(10.0 cm\)
E. \(15.0 cm\)