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

Curie is a unit of

Question # 2

There is present in paraffin a large amount of:

Question # 3

The number of protons inside a nucleus is called

Question # 4

Mass of neutron is

Question # 5

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

Question # 6

Radioactivity

Question # 7

Gamma rays consist of steam of

Question # 8

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

Question # 9

Beta particles are

Question # 10

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

Question # 11

When certain nucleus emits anα particle, its mass number:

Question # 12

Structure of the nucleus was explained by

Question # 13

The energy is found from Einstein's mass energy relation is called

Question # 14

1 amu is equal to.

Question # 15

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 γ-rays are
A. electrostatic waves
B. electromagnetic waves
C. heavy particles
D. longitudinal waves
2 Examples of moderators used in a fission reactor is/are:
A. Water
B. Heavy water
C. Carbon
D. Hydrocarbon
3 The number if neutrons in the nucleus of 92U235are
A. Infinite
B. 92
C. 235
D. 143
4 Charge on proton is
A. 1.59 x 10-9C
B. 1.59 x 10-7C
C. -1.59 x 10-19 C
D. 1.59 x 10-19C
5 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
6 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
7 The number of isotopes of hydrogen are
A. 2
B. 1
C. 3
D. 4
8 The number of all the protons and neutrons in a nucleus is known as
A. atomic number
B. mass number
C. charge number
D. none of these
9 The figure 1.007276μ shows the mass of an:
A. Atom
B. Positron
C. Electron
D. Neutron
10 Electrons are
A. positive charged
B. negatively charged
C. massless
D. neutral

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