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

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?

A radioactive element is placed in an evacuated chamber. Then the rate of radioactive decay will ______.

Complete the following radioactive reaction:

\[\ce{^-_-X -> ^-_-Y + ^4_2He -> ^234_91Z + ^0_-1e}\]

In the following atoms, which one is a radioisotope? Give one use of this isotope.

O¹⁶, C¹⁴, N¹⁴, He⁴

Name the radiations that are emitted during the decay of a nucleus, which has highest penetrating power?

Does the emission of gamma radiation result in a change in the mass number?

A radioactive nucleus X emits an alpha particle followed by two beta particles to form nucleus Y.

1. With respect to the element X, where would you position the element Y in the periodic table?
2. What is the general name of the elements X and Y?
3. If the atomic number of Y is 80 then what is the atomic number of X?