(English Medium) ICSE Class 10 - CISCE Important Questions for Physics

What happens if the negative potential is changed on a grid?

Name a gas caused by the Greenhouse effect

What is thermionic emission?

Name the unit in which the work function of a metal is expressed.

Complete the diagram as given above by drawing the deflection of radioactive radiations in an electric field

State any two precautions to be taken while handling radioactive substances

A nucleus `""_11^24Na`  emits a beta particle to change into Magnesium (Mg)

(i) Write the symbolic equation for the process.
(ii) What are numbers 24 and 11 called?
(iii) What is the general name of `""_12^24Mg `with respect to `""_11^24Na` ?

In a cathode ray tube state:
(i) the purpose of covering cathode by thorium and carbon.
(ii) the purpose of the fluorescent screen.
(iii) how is it possible to increase the rate of emission of electrons.

What are isobars?

Give one example of isobars.

Radiations given out from a source when subjected to an electric field in a direction perpendicular to their path are shown below in the diagram. The arrows show the path of the radiation A, B and C. Answer the following questions in terms of A, B and C.

1) Name the radiation B which is unaffected by the electrostatic field.

2) Why does the radiation C deflect more than A?

3) Which among the three causes the least biological damage externally.

4) Name the radiation which is used in carbon dating.

An electromagnetic radiation is used for photography in fog. [2]
(i) Identify the radiation.
(ii) Why is this radiation mentioned by you, ideal for this purpose ?

The radiation with maximum penetrating power is ______.

The nuclear radiation which gets deflected towards the negatively charged plate in an electric field is ______.

A nucleus \[\ce{^194_82X}\] emits an alpha particle

1. What will be the atomic number of the daughter nucleus Y?
2. What will be the number of neutrons in the daughter nucleus Y?
3. Write a nuclear reaction showing the emission of this particle.

A beam of α, β and γ rays is travelling through a certain region in space.

1. Arrange them in ascending order of ionising power.
2. Which of the above will pass undeviated if subjected to an electric field?
3. With respect to your answer to part (b) above, what will be the change in the nucleus of an atom after such a ray is emitted.

Which nuclear radiation will travel undeviated in an electric field?

How can one stop the radiations escaping from a nuclear reactor in a nuclear power plant?

Name one internal source of background radiations.

Which of the following radiations suffer maximum deflection in a magnetic field?