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

γ-rays are

Question # 2

Rate of decay is actually described by.

Question # 3

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

Question # 4

Proton was discovered by Rutherford in

Question # 5

According to Rutherford atomic model, the positive charge in an atom

Question # 6

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 # 7

Radioactivity

Question # 8

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

Question # 9

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

Question # 10

In wilson cloud chamber, the air becomes saturated with:

Question # 11

If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be

Question # 12

Heavy water is made of one oxygen atom and two atoms of:

Question # 13

Which of the following material has longer half life

Question # 14

In radioactive decay, the new element which is formed due to the disintegration of original element is called

Question # 15

The time required for a radioactive material to decrease in active by one half is called

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains
A. 3 more neutrons
B. 3 more electrons
C. 3 more protons
D. 3 more ions
2 Different radioactive material have
A. same half lives
B. different half lives
C. same mean lives
D. same total lives
3 When a nucleus emits an alpha particles, its charge number decreases by
A. 3
B. 2
C. 6
D. 5
4 The most abundant isotope of neon is
A. neon-20
B. neon-21
C. neon-22
D. neon-23
5 The nucleus left after the emission of some radiation is called:
A. Parent nucleus
B. Daughter necleus
C. Mother necleus
D. Any of these
6 Radioactivity was discovered by
A. Rutherford
B. Henri Becqureal
C. Maxwell
D. James Chadwick
7 A mass difference of 0.0012 u is equivalent to and energy of:
A. 0.5 Me V
B. 1.13 MeV
C. 5.13 MeV
D. 1.13 keV
8 In 1932 Chadwick discovered
A. proton
B. neutron
C. photon
D. electron
9 The chemical properties of an element depends upon the number of
A. electron
B. position
C. photons
D. neutrons
10 In wilson cloud chamber, the air becomes saturated with:
A. Alcohol vapours
B. Water
C. Helium gas
D. Nitrogen gas

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