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

The rate of decay of a radioactive substance

Question # 2

For an atom having atomic number Z and atomic weight A, the number of electron in an atoms

Question # 3

Beta particles are

Question # 4

The mass of the nucleus is always less than the total man of the protons and neutron that make up the nucleus. The difference of the two masses is called

Question # 5

Which of these is not a radiation detector

Question # 6

The unit of decay constant is

Question # 7

Which are not the elementary particles?

Question # 8

Phenomenon of radioactivity is due to disintegration of

Question # 9

Rutherford performed an experiment on nuclear reactions in:

Question # 10

When a charged particle passes through matter, it produces ionization, this effect is used in

Question # 11

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

Question # 12

1 amu is equal to

Question # 13

During the nuclear changes, the law/s of conservation that hold/s are that of:

Question # 14

Charge on proton is

Question # 15

Marie curie and Pierre curie discovered:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 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
2 Alfa , beta and gamma rays are emitted from a radio-active substance
A. spontaneously
B. when it is heated
C. when it is exposed to light
D. When it interacts with the other particle
3 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
4 Structure of the nucleus was explained by
A. J.J Thomson
B. Bohr
C. Millikan
D. Rutherford
5 The nucleus/nuclei of hydrogen is/are:
A. Proton
B. Deuteron
C. Triton
D. All of these
6 When certain nucleus emits anα particle, its mass number:
A. Increases by one
B. Decreases by one
C. Remain same
D. Decreases by four
7 How much time, theα-particle more massive than an electron
A. 600
B. 7000
C. 5000
D. 15000
8 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
9 The rate of decay of radioactive substance
A. is constant
B. decrease exponentially with time
C. varies inversely as time
D. decreases linearly with time
10 Which of the following material has longer half life
A. radium
B. polonium
C. radium
D. uranium

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