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

For what purpose are the transformers used?

How do the input and output powers in a transformer compare? State the assumption made.

Define the term kilowatt-hour and state its value in S.I unit

The temperature of the surrounding starts falling when ice in a frozen lake starts melting. Give reason.

Give two differences between the radioactive decay and nuclear fission.

What do you mean by power rating of an electrical appliance? How do you use it to calculate the resistance of the appliance.

What do you mean by power rating of an electrical appliance? How do you use it to calculate the safe limit of current in it, while in use?

An electrical appliance has a rating 100 W, 120 V. The resistance of element of appliance when in use is ______.

State one advantage of using a total reflecting prism as a reflector in place of plane mirror. 

Explain the meaning of the statement 'the power of an appliance is 100 W'.

An electrical appliance having a resistance of 200 Ω  is operated at 200 V. Calculate the energy consumed by the appliance in 5 minutes in joules.

What other name is given to nuclear fusion? Give reason.

Why is a very high temperature required for the process of nuclear fusion? State the approximate temperature required.

1. Write one nuclear fusion reaction.
2. State the approximate value of energy released in the reaction mentioned in part (a).
3. Give reason for the release of energy stated in part (b).

Complete the following fusion reaction:

\[\ce {^3_2He + ^2_1H -> ^\underline{}_2He + ^\underline{}_1H + energy}\]

Complete the following fusion reaction:

\[\ce {^2_1H + ^2_1H -> ^\underline{}_2He + ^1_\underline{}n + energy}\]

Name the process, nuclear fission or nuclear fusion, in which the energy released per unit mass is more?

State one similarity in the process of nuclear fission or fusion.

State two difference between the process of nuclear fission and fusion.

Give two examples of nuclear fusion.