Physics Past Questions and Answers

What is the angular magnification of a telescope having objective and eyepiece lenses of a focal lengths 30cm and 3cm respectively?

A wire of length 10m is cooled from 50^oC to 10^oC. Calculate the decrease in the length of the wire. [c = 3 x 10^-5K^-1]

When an athlete perspires after running, he loses heat through

The rate of cooling of a heated quantity of liquid in an enclosure depends on the

The heat required to raise a mass of a substance through 1K is known as