(English Medium) ICSE Class 10 - CISCE Question Bank Solutions for Physics

State the energy transformation on the following:

Electricity is obtained from nuclear energy.

State four ways for the judicious use of energy.

MULTIPLE CHOICE TYPE:

The ultimate source of energy is:
(a) wood
(b) wind
(c) water
(d) sun

Renewable source of energy is:

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

A hydroelectric power station takes its water from a lake whose water level is 50 m above the turbine. Assuming an overall efficiency of 40%, calculate the mass of water which must flow through the turbine each second to produce power output of 1 MW. (Take g = 10 m s⁻²).

(i) Define critical angle.
(ii) State one important factor which affects the critical angle of a given medium.

The diagram below shows a light source P embedded in a rectangular glass block ABCD of critical angle 42°. Complete the path of the ray PQ till it emerges out of the block. [Write necessary angles].

Draw a neat labeled diagram of an A.C. generator 

Is centrifugal force considered as the force of reaction of the centripetal force?

Name the energy changes for the following:
electric ball 

Name the energy changes for the following:
 bicycle brakes

Name the energy change for the following:

pendulum

Name the energy changes for the following 
human body    

Name the energy changes for each of the following cases:
 dynamo