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

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Question # 1

Gamma rays consist of steam of

Question # 2

Charge on proton is

Question # 3

The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains

Question # 4

When thorium nucleus emits aβ-particle, the daughter nucleus is called:

Question # 5

The number if neutrons in the nucleus of 92U235are

Question # 6

The unit of decay constant is:

Question # 7

The half lie of radium-226 is

Question # 8

The total charge of any nucleus is given as

Question # 9

Proton was discovered by Rutherford in

Question # 10

The most abundant isotope of neon is

Question # 11

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

Question # 12

Charge on neutron is

Question # 13

If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be

Question # 14

Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called

Question # 15

Maric Curie and Pieree Curie discovered two new radioactive elements, which are called

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 When a nucleus emits an alpha particles, its charge number decreases by
A. 3
B. 2
C. 6
D. 5
2 For an atom having atomic number Z and atomic weight A, the number of electron in an atoms
A. A - Z
B. A + Z
C. Z
D. A
3 The counter, which also provides the power to the G.M. tube is called:
A. Thin mica window
B. thin glass window
C. Airy window
D. Wooden window
4 Examples of moderators used in a fission reactor is/are:
A. Water
B. Heavy water
C. Carbon
D. Hydrocarbon
5 The nucleus left after the emission of some radiation is called:
A. Parent nucleus
B. Daughter necleus
C. Mother necleus
D. Any of these
6 Gamma rays consist of steam of
A. electron
B. proton
C. photons
D. all of these
7 During the nuclear changes, the law/s of conservation that hold/s are that of:
A. Charge
B. energy
C. Momentum
D. Mass
8 The rate of decay of a radioactive substance
A. decrease exponentially with time
B. decreases linearly with time
C. increases linearly with time
D. increases exponentially with time
9 For an atom having atomic number Z and atomic weight A, the charge on the nucleus is
A. A - Z
B. A + Z
C. Z
D. A
10 A mass difference of 0.0012 u is equivalent to and energy of:
A. 0.5 Me V
B. 1.13 MeV
C. 5.13 MeV
D. 1.13 keV

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