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

Electrons are

Question # 2

Pair production take place when energy ofγ-rays photon is

Question # 3

Rutherford performed an experiment on nuclear reactions in:

Question # 4

Binding energy per nucleus is

Question # 5

U-238 present in the natural uranium is about:

Question # 6

Alfa particles are

Question # 7

When a nucleus emits an alpha particles, its charge number decreases by

Question # 8

Charge on proton is

Question # 9

Nucleon means:

Question # 10

Nucleus consists of

Question # 11

The nucleus/nuclei of hydrogen is/are:

Question # 12

Phenomenon of radioactivity is due to disintegration of

Question # 13

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

Question # 14

Which of the following material has longer half life

Question # 15

Neon gas have three isotopes whose atomic numbers are

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 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
2 1 amu is equal to.
A. 1.66 x 10-24kg
B. 1.66 x 10-19kg
C. 1.66 x 10-24kg
D. 1.66 x 10-27kg
3 When a charged particle passes through matter, it produces ionization, this effect is used in
A. fission reaction
B. reactor
C. radiation detector
D. fusion reaction
4 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
5 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
6 Curie is a unit of
A. reluctance
B. resistivity
C. binding energy
D. radioactivity
7 After alpha decay the atomic number of the atom
A. increase by four
B. decreases by two
C. increases by two
D. decrease by four
8 The range of particle depends upon the factor
A. charge, mass and energy of particle
B. density of medium
C. ionization potential of the atoms
D. all the above
9 The missing mass which is converted to energy in the formation of nucleus, is called
A. packing fraction
B. mass defect
C. binding energy
D. none of these
10 Neutron was discovered by
A. Curie
B. Roentgen
C. Chadwick
D. Rutherford

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