Physics MCQs Online Entry Test Preparation

Q.1: An alpha particle is emitted from 88Ra226. What is the mass and atomic number of the daughter nucleus ?

1. 224 – 84
2. 220 – 80
3. 222 – 86
4. 226 – 87

Q.2: The unit of radioactivity curie is equal to———?

1. 3.74 x 109 disintegration per sec
2. 3.70 x 1010 disintegration per sec
3. 3.55 x 1010 disintegration per sec
4. 3.60 x 1010 disintegration per sec

Q.3: The unit of radioactivity curie is equal to——–?

1. 3.74 x 109 disintegration per sec
2. 3.70 x 1010 disintegration per sec
3. 3.55 x 1010 disintegration per sec
4. 3.60 x 1010 disintegration per sec

Q.4: During the fission process a large amount of——-?

1. Heat energy is released
2. Nuclear energy is released
3. Chemical energy is released
4. Light energy is released

Q.5: Ina liquid metal fast breeder reactor, the type of uranium used is——-?

1. 92U235
2. 92U238
3. 92U234
4. 92U239

Q.6: Radioactive materials can be identified by measuring their——–?

1. Hardness
2. Density
3. Mass
4. Half life

Q.7: If one or more of the neutrons emitted during fission cab be used to build up further fission then the reaction is self-sustained and is known as ———?

1. Fission reaction
2. Fusion reaction
3. Chain reaction
4. Chemical reaction

Q.8: Pair production takes place in the vicinity of a heavy nucleus so that——-?

1. Net energy is conserved
2. Net charge is conserved
3. Net momentum is conserved
4. All of the above

Q.9: During an encounter with an atom alpha particle knocks out ——-?

1. Protons
2. Electrons
3. Neutrons
4. Nothing

Q.10: The path of alpha particle is——–?

1. Rectilinear
2. Curved
3. Zig-zag or erratic
4. Elliptical