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

00:00
Question # 1

Curie is a unit of

Question # 2

Radioactivity was discovered by:

Question # 3

1 amu is equal to.

Question # 4

Marie curie and Pierre curie discovered:

Question # 5

In radio-active decay, the original element which disintegrate to another element is called

Question # 6

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

Question # 7

The number of protons inside a nucleus is called

Question # 8

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

Question # 9

Radium was discovered by:

Question # 10

For an atom having atomic number Z and atomic weight A, the charge on the nucleus is

Question # 11

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

Question # 12

Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called

Question # 13

In his experiment on nuclear reactions, Rutherford bombardedα particles on:

Question # 14

A pair of quark and antiquark makes a:

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 How much time, theα-particle more massive than an electron
A. 600
B. 7000
C. 5000
D. 15000
2 Radiation detector are used to
A. measure intensity of radiation
B. measure energy of radiation
C. difference between different types of radiation
D. all the above
3 The half life of uranium-238 is
A. 6.2 x 109years
B. 4.5 x 109days
C. 4.5 x 109years
D. 1.3 x 106years
4 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
5 Alfa particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
6 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
7 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
8 The half lie of radium-226 is
A. 238 years
B. 4.5 x 109days
C. 1620 years
D. 332 years
9 Neutron was discovered in
A. 1915
B. 1920
C. 1925
D. 1932
10 Neon gas have three isotopes whose atomic numbers are
A. 20, 24 , 23
B. 20, 21 , 22
C. 20, 19 , 21
D. none of these

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  • alishba rasheed

    alishba rasheed

    03 Mar 2018

    easy mcqs

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