ECAT Pre Engineering Physics Chapter 21 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 21 Nuclear Physics

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Physics ECAT Pre Engineering Chapter 21 Nuclear Physics

00:00
Question # 1

1 amu is equal to.

Question # 2

The figure 1.007276μ shows the mass of an:

Question # 3

Radioactivity is

Question # 4

The rate of decay of a radioactive substance

Question # 5

Structure of the nucleus was explained by

Question # 6

Alfa particles are

Question # 7

Pair production take place when energy ofγ-rays photon is

Question # 8

Neutron was discovered in

Question # 9

A mass spectrograph sort out

Question # 10

Nuclei that have the same charge number but different mass number are called

Question # 11

Proton was discovered by Rutherford in

Question # 12

The time required for a radioactive material to decrease in active by one half is called

Question # 13

In 1932 Chadwick discovered

Question # 14

The distance travelled byα-particle in a medium before coming to rest, is called

Question # 15

When a nucleus emits an alpha particle, it atomic mass decreased by

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The amount of energy equivalent to 1 a.m.u is
A. 9.315 Mev
B. 93.15 Mev
C. 931.5 Mev
D. 2.22 Mev
2 Beta particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
3 Which of the following material has longer half life
A. radium
B. polonium
C. radium
D. uranium
4 The missing mass which is converted to energy in the formation of nucleus, is called
A. packing fraction
B. mass defect
C. binding energy
D. none of these
5 The rate of decay of radioactive substance
A. is constant
B. decrease exponentially with time
C. varies inversely as time
D. decreases linearly with time
6 Neutron was suggested to be in the nucleus by:
A. Rutherford in 1920
B. Bohar in 1913
C. Dirac in 1928
D. Anderson in 1932
7 There is present in paraffin a large amount of:
A. Nitrogen
B. Hydrogen
C. Carbon
D. Baryllium
8 A curie represents a very strong source of
A. α-particle
B. β-particle
C. γ-particle
D. none of these
9 Structure of the nucleus was explained by
A. J.J Thomson
B. Bohr
C. Millikan
D. Rutherford
10 Nucleon means:
A. Only electrons
B. Only neutrons
C. Only protons
D. Both (A ) and (C)

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