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

State three uses of an electromagnet?

State two differences between an electromagnet and a permanent magnet.

Name the material used for making the armature of an electric bell. Give a reason for your answer.

What is an electric motor?

principle of an electric motor ?

Name the material of core in (a) an electric bell, (b) electromagnet, (c) a d.c. motor, (d) an a.c. generator and (e) a transformer.

Name the S.I. unit of heat.

Differentiate between heat capacity and specific heat capacity.

Name a liquid which has the highest specific heat capacity.

Write the approximate value of specific heat capacity of water in S.I. unit.

What do you mean by the following statement?

The heat capacity of a body is 50 JK^-1?

What do you mean by the following statement?

The specific heat capacity of copper is 0. 4 Jg^-1 K^-1?

Write the expression for the heat energy Q received by the substance when m kg of substance of specific heat capacity c Jkg^-1 k^-1 is heated through Δt° C.

Two metallic blocks P and Q of masses in ratio 2: 1 are given the same amount of heat. If their temperature rise by the same amount, compare their specific heat capacities.

Why do the farmers fill their fields with water on a cold winter night?

Discuss the role of high specific heat capacity of water with reference to climate in coastal areas.

Water is used in hot water bottles for fomentation. Give a reason.

Water property of water makes it an effective coolant?

Give one example where high specific heat capacity of water is used as cooling purposes?

Give one example where high specific heat capacity of water is used as heat reservoir ?