Physics Past Questions and Answers

The image of any real object formed by a diverging lens is always

Which of the following is not self-luminous?

An object is placed on the principal axis at the centre of curvature of a concave mirror. The image of the object formed by the mirror is

A wire is stretched between two points, 1m apart. If the speed of the wave generated on plucking the wire is 200ms^-1, what is the minimum frequency which will resonate with the wire?

Sixty complete waves pass a particular point in 4s. lf the distance between three successive troughs of the waves is 15m, calculate the speed of the waves,