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

00:00
Question # 1

Nucleus of a hydrogen atom may contain:

Question # 2

Charge on neutron is

Question # 3

The half life of uranium-238 is

Question # 4

Radioactivity was discovered by:

Question # 5

Alfa particles are

Question # 6

Which of the following material has longer half life

Question # 7

Nucleus consists of

Question # 8

The rate of decay of a radioactive substance

Question # 9

How many isotopes of helium are present?

Question # 10

Radioactivity

Question # 11

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

Question # 12

Three quarks make:

Question # 13

Gamma rays consist of steam of

Question # 14

Electrons are

Question # 15

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m
2 The penetration power ofβ-particle is
A. zero
B. less thanα-particle
C. equal toα-particle
D. greater thanα-particle
3 When certain nucleus emits anα particle, its mass number:
A. Increases by one
B. Decreases by one
C. Remain same
D. Decreases by four
4 1 amu is equal to
A. 1.66 x 10-24kg
B. 1.66 x 10-19kg
C. 1.66 x 10-34kg
D. 1.66 x 10-27kg
5 For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is
A. A - Z
B. A
C. Z
D. A + Z
6 Proton was discovered by Rutherford in
A. 1915
B. 1906
C. 1910
D. 1920
7 U-238 present in the natural uranium is about:
A. 59%
B. 0.007%
C. 99%
D. 39%
8 Marie curie and Pierre curie discovered:
A. Uranium
B. Polonium
C. Radium
D. Both (A) and (C)
9 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
10 The energy is found from Einstein's mass energy relation is called
A. binding energy of electron
B. binding energy of proton
C. binding energy of neutron
D. binding energy of nucleus

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