Refraction through a Lens — Physics STD 10 — Question

Which of the radioactive radiations can cause severe genetical disorders and are deflected by an electric field?

What do you mean by a rheostat?

Is it possible to have an accelerated motion with a constant speed? Name such type of motion.

Give one example when:
Electric energy changes to mechanical energy.

Complete the following sentence:
In a step-up transformer, the number of turns in the primary are …………than the number of turns in the secondary.

Two waves of the same pitch have amplitudes in the ratio 1:3. What will be the ratio of loudness?

By reducing the amplitude of a sound wave, its:

• Pitch increases

• Loudness decreases

• Loudness increases

• Pitch decreases

An obliquely incident light ray bends at the surface due to change in speed, when passing from one medium to other. The ray does not bend when it is incident normally. Will the ray have different speed in the other medium?

What do you understand by amplitude of an oscillation?

What kind of energy is possessed in a situation when?
A horse running along a level road