Physics Past Questions and Answers

the ratio of the linear expansivity of copper to that of iron is approximately 1.5. A specimen of iron and a specimen of copper expands by the same amount per unit rise in temperature. The ratio of their length is

A man stands one-third of the way between two walls and claps his hands, He hears two distinct echoes 1s apart. If the speed of sound is 330ms<sup style='font-size: smaller;'>-1</sup> the distance between the wall is

A cell has an open circuit voltage V<sub style='font-size: smaller;'>1</sub> and a closed circuit voltage V<sub style='font-size: smaller;'>2</sub> when a current is flowing through it. Therefore, the internal resistance of the cell is

According to Ohm's law, the ratio V/I is constant for

In the process of electrification by induction, the amount of induced charge in relation to the inducing charge is the