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

Name the energy changes for the following:
electric ball 

Name the energy changes for the following:
 bicycle brakes

Name the energy changes for the following:
pendulum    

Name the energy changes for the following 
human body    

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

The following are some of the energy transformations.
A. Electrical to light
B. Work to heat
C. Chemical to light
D. Electrical to sound
E. Mechanical to electrical
Identify the energy transformation that takes place in the following by inserting the corresponding letter in the shape provided.
(i)    A candle flame                       
(ii)    A torch is lighted                    
(iii)    A microphone is used in a meeting
(iv)    A cycle dynamo                        
(v)    A piece of metal is being filed 

Identify the type of energy possessed by the body in each of the following:
(a) A coiled spring of the toy car
(b) A hammer which is raised
(c) A stone shot from a catapult
(d) Water stored in the overhead tank
(e) A tadpole moving in water.

 Can a transformer work when it is connected to a D.C. source? Give a reason.

Draw a simple labeled diagram of a step-down transformer.

Draw a simple labeled diagram of a step-up transformer.

The diagram 10 shows two coils X and Y. The coil X is connected to a battery S and a key K. The coil Y is connected to a galvanometer G.

When the key K is closed. State the polarity
(i)At the end of the coil X,
(ii)At the end C of the coil Y,
(iii)At the end C of the coil Y if the coil Y is (a) Moved towards the coil X, (b) Moved away from the coil X.

The following diagram shows a fixed coil of several turns connected to a center zero galvanometer G and a magnet NS which can move in the direction shown in the diagram.

1. Describe the observation in the galvanometer if
   1. The magnet is moved rapidly,
   2. The magnet is kept still after it has moved into the coil
   3. The magnet is then rapidly pulled out the coil.
2. How would the observation in (i) of part (a) change if a more powerful magnet is used?

Draw and label the diagram of a simple D.C. motor.
(a) Explain the rotation of the coil, giving a reason for your answer.
(b) How can you reverse the direction of rotation of the armature?
(c) How can you increase the speed of rotation of the motor?