Current Electricity — Physics STD 10 — Question

State the energy changes which take place when Water stored in the dam is used to turn turbine in dynamo.

State how are the two resistors joined with a battery in each of the following cases when:

equivalent resistance is less than either of the two resistances

What do you understand by the term couple? State its effect.

Give two characteristic of the virtual image formed by a convex lens.

Name two examples in which the mechanical energy of a system remains constant.

What is meant by the term 'electromotive force' of a cell?

Name the unit used to measure the sound level.

Define energy of a body.

Energy can exist in several forms and may change from one form to another. For the following, state the energy changes that occur in:
Charging of a battery.

Is kinetic energy a scalar or a vector physical quantity?