Thermionic Emission and Radioactivity — Physics STD 10 — Question

Define the term Amplitude.

Which colour of light travels fastest in any medium except air?

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

How much energy is gained by a box of mass 20 kg when a man
carrying the box waits for 5 minutes for a bus?

Give the range of wavelength of the electromagnetic waves visible to us.

Name the type of energy (kinetic energy K or potential energy U) possessed in the given cases:
An arrow shot out of a bow.

State the energy changes in the following case while in use:
an electric toaster.

Does the specific heat depend upon the temperature?

The stone of hand flour grinder is provided with a handle near its rim. Give reason.

(a) What determines pitch of sound?
(b) (i) Name one factor which affects the frequency of sound emitted due to vibrations in an air column.
(ii) Name the unit used for measuring the sound level.