ECAT Pre Computer Science Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

Try The MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

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ECAT Physics Chapter 21 Nuclear Physics

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Question # 1

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

Question # 2

The penetration power ofβ-particle is

Question # 3

Neutrons are

Question # 4

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

Question # 5

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

Question # 6

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

Question # 7

Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:

Question # 8

Which of the following material has longer half life

Question # 9

The chemical properties of an element depends upon the number of

Question # 10

Rate of decay is actually described by.

Question # 11

Mass of neutron is

Question # 12

A particle having the mass of electron and charge of a proton is called a

Question # 13

The number of protons inside a nucleus is called

Question # 14

The nucleus left after the emission of some radiation is called:

Question # 15

Charge on neutron is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The total charge of any nucleus is given as
A. Ze2
B. Z2e
C. Z/e
D. Ze
2 A particle having the mass of electron and charge of a proton is called a
A. photon
B. position
C. antiproton
D. antineutrino
3 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
4 Different radioactive material have
A. same half lives
B. different half lives
C. same mean lives
D. same total lives
5 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
6 The time required for a radioactive material to decrease in active by one half is called
A. half time
B. half life
C. disintegration time
D. mean life
7 The unit of decay constant is:
A. Second
B. Metre
C. Hour
D. Year
8 If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be
A. Equal to 1
B. Less than 1
C. Greater than 1
D. Infinity
9 When thorium nucleus emits aβ-particle, the daughter nucleus is called:
A. Protactinium
B. Actinium
C. Uranium
D. Radium
10 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

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