ECAT Pre Engineering Physics Chapter 21 MCQ Test With Answer

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

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

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Physics ECAT Pre Engineering Chapter 21 Nuclear Physics

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Question # 1

When certain nucleus emits aβ-particles, is mass number:

Question # 2

γ-rays behave like a particle because they explain the

Question # 3

After alpha decay the atomic number of the atom

Question # 4

The rate of decay of a radioactive substance

Question # 5

The missing mass which is converted to energy in the formation of nucleus, is called

Question # 6

U-238 present in the natural uranium is about:

Question # 7

When certain nucleus emits anα particle, its mass number:

Question # 8

Proton was discovered by Rutherford in

Question # 9

The penetration power ofβ-particle is

Question # 10

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

Question # 11

When a charged particle passes through matter, it produces ionization, this effect is used in

Question # 12

The amount of energy equivalent to 1 a.m.u is

Question # 13

The diameter of an atom is of the order

Question # 14

In radioactive decay, the new element which is formed due to the disintegration of original element is called

Question # 15

The chemical behaviour of an atom is determined by

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 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
2 γ-rays are
A. electrostatic waves
B. electromagnetic waves
C. heavy particles
D. longitudinal waves
3 How many isotopes of helium are present?
A. 1
B. 2
C. 3
D. 4
4 In wilson cloud chamber, the air becomes saturated with:
A. Alcohol vapours
B. Water
C. Helium gas
D. Nitrogen gas
5 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
6 Alfa , beta and gamma rays are emitted from a radio-active substance
A. spontaneously
B. when it is heated
C. when it is exposed to light
D. When it interacts with the other particle
7 The number if neutrons in the nucleus of 92U235are
A. Infinite
B. 92
C. 235
D. 143
8 Gamma rays consist of steam of
A. electron
B. proton
C. photons
D. all of these
9 How much time, theα-particle more massive than an electron
A. 600
B. 7000
C. 5000
D. 15000
10 The number of isotopes of hydrogen are
A. 2
B. 1
C. 3
D. 4

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