(English Medium) ICSE Class 9 - CISCE Question Bank Solutions

Define temperature on the basis of the kinetic theory of matter.

Define calorie. How many joules make one calorie?

A body absorbs 1680 J of heat energy. How many calories of heat is absorbed by the body?

A body radiates out 300 calories of heat energy. How much heat energy is radiated out by the body in joules?

Explain, why are the taps left dripping in sub-zero temperatures during winter?

Describe an experiment to prove that a material medium is necessary for the propagation of sound.

How do you account for the following fact?

Iron becomes magnetized when placed in a coil carrying direct current.

How do you account for the following fact?

Bar magnets lose their magnetism when heated strongly.

How do you account for the following fact?

Steel makes better permanent magnet than soft iron.

Describe various methods of magnetising a piece of iron.

What is magnetic induction?

Explain a suitable experiment of magnetic induction?

A magnet is carefully broken into two halves along its long axis as shown in the figure. How would the magnetic strength of each piece compare with that of the original magnet?

A magnet is carefully broken into two equal pieces as shown in the figure. How would the magnetic field strength of each piece compare with that of the original magnet? 

A conductor B is charged by bringing another charged body A in contact 

What will be the charge gained by B?

A conductor B is charged by bringing another charged body A in contact 

Explain the process of charging B.

Explain, what is meant by magnetic induction.