List of top Questions asked in UP CPMT- 2004

The intensity of sound from a radio at a distance of $2$ meters from its speaker is $1 \times 10^{-2} \mu W/m^2$. The intensity at a distance of $10$ meters would be

A streched string vibrates with a fundamental frequency of $200$ Hz. If its mass per unit length were to be doubled. What would be the frequency of the first harmonic ?

Light can be polarized because it

An object travels $10$ km at a speed of $100$ m/sec and another $10$ km at $50$ m/sec. The average speed over the whole distance is

Light can be polarized by

The time period of a simple pendulum is to be doubled. Its length should be

A concave lens and a convex lens have same focal length of $20$ cm and both put in contact with combination is used to view an object $5$ cm long kept at $20$ cm from the lens combination. As compared to object the image will be.

Longitudinal waves cannot show the phenomenon of