Physics FSC Part 2 Chapter 21 Online MCQ's Test With Answers

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Physics FSC Part 2 Chapter 21 Online MCQ's Test

Sr. # Questions Answers Choice
1 The half life of radioactive elements depends upon Temperature Nature of element Amount of the radioactive substance Pressure
2 Half life of Uranium -239 is 26.5 minutes 24.5 minutes 25.5 minutes 23.5 minutes
3 Materials can be identified by measuring their Mass Half life Both a and b None of a,b,c
4 Half life of radon gas is 3.8 minutes 3.8 days 3.8 months 3.8 years
5 The force which is responsible for the breaking up of the radioactive element is. Weak nuclear force Strong nuclear force Electromagnetic force Gravitational force
6 X -rays are similar in nature to. Gama rays Beta rays Alpha rays Cathode rays
7 Marie Curie and Pierre Curie discovered. Uranium Uranium and Radium Polonium and radium Radium
8 When gama rays are emitted, the nuclear mass. Decreases by 4 units Does not change Increases by 2 units Increase by 1 unit
9 The activity of radioactive sample Is constant Increases with time Decreases linearly with time Decreases exponentially with time
10 There is no charge in A and Z of any radioactive element by the emission of. Alpha particle Beta particle Gama particle X- rays
11 Which one of the following is not affected by electric or magnetic field. Beta rays Gama ryas Alpha rays Electron
12 The reciprocal of decay construct lamda of a radioactive element is. Half life Mean life Curie total life
13 When a nucleus emits an alpha particle, its atomic mass decreases by 1 2 3 4
14 The charge of an alpha particle is equal to -e +e -2e 2e
15 Binding energy per nucleon is maximum for Platinum Iron Uranium Lead
16 Energy released by conversion of 1 amu is 200 MeV 931 MeV 233 MeV 243 MeV
17 Which is true for both alpha particle and gama rays. They cause ionization in air They can be deflected by electric field They can be deflected by magnetic field The y can penetrate a few millimeters of aluminium
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