WAEC Physics Past Questions & Answers - Page 283

Which of the following is not an example of a force?

An electric string of length l is elastically stretched through a length e by a force F. The area of cross- section of the string is A and its Young’s modulus is E. Which of the following expressions is correct?

The process by which a metal, heated to high temperature, gives off electrons from its surface is known as

A sheet of paper is placed in the path of a beam of radiations from a radioactive source. Which of the following radiations will pass through the paper?

I. Alpha rays
II. Beta rays
III. Gamma rays

When the nucleus of a uranium atom is split into two fragments of nearly equal mass the sum of the masses of the fragments is less than the mass of the original nucleus. This difference is a measure of the