Physics Past Questions and Answers

A bar AB is balanced horizontally on two knife edges as illustrated as in the diagram above. Determine the weight of the bar.

To obtain a virtual, erect and magnified image from a thin converging lens, an object must be placed

The diagram above represents a transverse travelling wave. Which two points are 180° out of phase?

Two objects P and Q of masses 100kg and 20kg respectively are 1.2m apart on a horizontal surface. Calculate the net gravitational force acting on Q. \([G= 6.67 \times 10^{-11} Nm^{2}kg^{-2}]\)

The primary of a transformer has 100 turns and its secondary has 200 turns. If the voltage at the primary is 100V, determine the voltage at the secondary.