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

Neutron was suggested to be in the nucleus by:

Question # 2

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 # 3

How many isotopes of helium are present?

Question # 4

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

Question # 5

Nucleus of a hydrogen atom may contain:

Question # 6

Examples of moderators used in a fission reactor is/are:

Question # 7

1 amu is equal to.

Question # 8

Heavy water is made of one oxygen atom and two atoms of:

Question # 9

Binding energy per nucleus is

Question # 10

The reciprocal of decay constant λ of a radioactive material is:

Question # 11

The unit of decay constant is

Question # 12

Three quarks make:

Question # 13

Mass of neutron is

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 There is present in paraffin a large amount of:
A. Nitrogen
B. Hydrogen
C. Carbon
D. Baryllium
2 The time required for a radioactive material to decrease in active by one half is called
A. half time
B. half life
C. disintegration time
D. mean life
3 Beta particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
4 The unit of decay constant is
A. sex
B. sec2
C. sec-1
D. sec-2
5 The most abundant isotope of neon is
A. neon-20
B. neon-21
C. neon-22
D. neon-23
6 If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by
A. -4
B. 4
C. 2
D. 1
7 Curie is a unit of
A. reluctance
B. resistivity
C. binding energy
D. radioactivity
8 Binding energy per nucleus is
A. greater for heavy nucleus
B. least for heavy nucleus
C. greatest for light nuclei
D. decreases for medium weight niclei
9 When a nucleus emits an alpha particle, it atomic mass decreased by
A. 2
B. 1
C. 4
D. 3
10 The half life of radioactive substances depends upon
A. amount of substance
B. energy of substance
C. state of substance
D. temperature of substance

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