Post Utme Physics Past Questions and Answers

Question 976:

Which of the following have the longest wavelengths?

A. Infra-red rays
B. Gamma rays
C. X-rays
D. Ultra-violet rays
E. Radio waves

Question 977:

The wave length of the first overtone of a note in a closed pipe of length \(33 cm\) is ____________

A. \(44 cm\)
B. \(33 cm\)
C. \(22 cm\)
D. \(17 cm\)

Question 978:

None-luminous objects can be seen because they ____________

A. Are polished
B. Are near
C. Reflect light
D. Emit light

Question 979:

The correct unit of energy density is ____________

A. \(kg m ^{-3} s ^{-2}\)
B. \(kg m ^{-1} s ^{-2}\)
C. \(kg m ^{3} s ^{-2}\)
D. \(kg m ^{2} s ^{-2}\)

Question 980:

The motion of smoke particles from a chimney is typical of ____________

A. Oscillatory motion
B. Rotational motion
C. Circular motion
D. Random motion