ECAT Pre Computer Science Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

Try The MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

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ECAT Physics Chapter 21 Nuclear Physics

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Question # 1

For Protium, the mass defect is:

Question # 2

Radioactivity was discovered by

Question # 3

During the nuclear changes, the law/s of conservation that hold/s are that of:

Question # 4

1 amu is equal to

Question # 5

The half lie of radium-226 is

Question # 6

The energy acquired by a mass of 1g moving with the speed of light is

Question # 7

After alpha decay the atomic number of the atom

Question # 8

Mass of proton is

Question # 9

If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by

Question # 10

The half life of uranium-238 is

Question # 11

Which of the following material has smaller has life

Question # 12

Alfa , beta and gamma rays are emitted from a radio-active substance

Question # 13

A mass difference of 0.0012 u is equivalent to and energy of:

Question # 14

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

Question # 15

Structure of the nucleus was explained by

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Fraction of the decaying atoms per unit time is called
A. decay atom
B. decay element
C. decay constant
D. decay
2 Beta particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
3 Different radioactive material have
A. same half lives
B. different half lives
C. same mean lives
D. same total lives
4 During the nuclear changes, the law/s of conservation that hold/s are that of:
A. Charge
B. energy
C. Momentum
D. Mass
5 According to Rutherford atomic model, the positive charge in an atom
A. is concentrated at its centre
B. is in the form of positive electron at same distance from its centre
C. is spread uniformly through its volume
D. none of these
6 Gamma rays consist of steam of
A. electron
B. proton
C. photons
D. all of these
7 A mass spectrograph sort out
A. molecules
B. atoms
C. elements
D. isotopes
8 After alpha decay the atomic number of the atom
A. increase by four
B. decreases by two
C. increases by two
D. decrease by four
9 Curie is a unit of
A. reluctance
B. resistivity
C. binding energy
D. radioactivity
10 The energy acquired by a mass of 1g moving with the speed of light is
A. 3 x 108J
B. 9 x 1013J
C. 3 x 1013J
D. 9 x 1016J

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