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

A curie represents a very strong source of

Question # 2

Neon gas have three isotopes whose atomic numbers are

Question # 3

The number of isotopes of hydrogen are

Question # 4

How much time, theα-particle more massive than an electron

Question # 5

After alpha decay the atomic number of the atom

Question # 6

In 1932 Chadwick discovered

Question # 7

Rutherford performed an experiment on nuclear reactions in:

Question # 8

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

Question # 9

Mass of proton is

Question # 10

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

Question # 11

Radiation detector are used to

Question # 12

β-particles are easily deflected by collisions than heavy

Question # 13

Radioactivity is

Question # 14

The penetration power ofβ-particle is

Question # 15

Beta particles are

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Pair production take place when energy ofγ-rays photon is
A. equal to 1.02 Mev-
B. greater than 1.02 Mev
C. less than 1.02 Mev
D. none of these
2 Nuclei that have the same charge number but different mass number are called
A. isotones
B. isomers
C. isotopes
D. isobars
3 Alfa particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
4 Which are not the elementary particles?
A. Photons
B. Leptons
C. Hadrons
D. Quarks
5 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
6 In radio-active decay, the original element which disintegrate to another element is called
A. element
B. daughter element
C. parent element
D. none of these
7 The most abundant isotope of neon is
A. neon-20
B. neon-21
C. neon-22
D. neon-23
8 Charge on neutron is
A. 1.6 x 10-19C
B. zero
C. -1.6 x 10-19C
D. 1.2 x 10-19C
9 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
10 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

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