Heat — Physics STD 10 — Question

State the energy transformation on the following:
Electricity obtained from hydro energy.

Why is it more difficult to move a magnet into the coil which has large number of turns?

Name the type of energy (kinetic energy K or potential energy U) possessed in the given cases:
A moving bus

A mixture of radioactive substance gives off three types of radiation name the radiation which is not affected by an electric field.

Define kinetic energy.

What is the order of current drawn by appliances connected to the ‘light circuit’ of a household?

Of the three connecting wires in a bousehold circuit:
(a) Which two of the three wires are at the same potential?
(b) In which of the three wires should the switch be connected?

What is a single fixed pulley? State its one use.

What is consumed while using different electrical appliances, for which electricity bills are paid?

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