Physics Past Questions and Answers

A sheet of paper is placed in the path of the following radiations: I. Alpha particles II. Beta particles III. Gamma rays. Which of the radiations will pass through the sheet of paper?

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

Question 697:

Which of the following are the essential parts of an atomic bomb?

A Uranium and neutrons
B Radium and polonium
C Nitrogen and neutrons
D Ranium and Î± - particles.

Question 698:

Which of the following is not a safety precaution in a nuclear station?

A Radioactive materials are stored in glass casings
B Radioactive materials are handled with remote-controlled tongs
C Technicians in nuclear stations wear radio-sensitive badges which are checked regularly.
D Radioactive materials are kept in thick-walled lead containers

Question 699:

Explain plane polarisation of light

Question 700:

A stone is projected horizontally from the top of a tower with a speed of 5ms-1. It lands on the ground level at a horizontal distance of 20m from the foot of the tower. Calculate the height of the tower. (g = 10ms\(^{-2}\))