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

Electrons are

Question # 2

The nuclei of an element having the same charge number but different mass numbers are called:

Question # 3

Proton was discovered by Rutherford in

Question # 4

In wilson cloud chamber, the air becomes saturated with:

Question # 5

Marie curie and Pierre curie discovered:

Question # 6

Three quarks make:

Question # 7

Referring to the above figure, we can say that of all the elements, the most stable element is

Question # 8

The rate of decay of a radioactive substance

Question # 9

Fraction of the decaying atoms per unit time is called

Question # 10

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

Question # 11

An alpha particle has a charge of

Question # 12

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

Question # 13

Radiation detector are used to

Question # 14

The rate of decay of radioactive substance

Question # 15

Radioactivity was discovered by

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Marie curie and Pierre curie discovered:
A. Uranium
B. Polonium
C. Radium
D. Both (A) and (C)
2 When radioactive nucleus emits aβ-particle, the proton-neutron ratio
A. decrease
B. increase
C. same
D. none of these
3 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m
4 Neutron was discovered by
A. Curie
B. Roentgen
C. Chadwick
D. Rutherford
5 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
6 Phenomenon of radioactivity is due to disintegration of
A. nucleus
B. neutron
C. proton
D. molecule
7 The nucleus left after the emission of some radiation is called:
A. Parent nucleus
B. Daughter necleus
C. Mother necleus
D. Any of these
8 The figure 1.007276μ shows the mass of an:
A. Atom
B. Positron
C. Electron
D. Neutron
9 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
10 Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called
A. deuteron
B. deterium
C. protium
D. tritium

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  • alishba rasheed

    alishba rasheed

    03 Mar 2018

    easy mcqs

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