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 unit of decay constant is:

Question # 2

The number of protons inside a nucleus is called

Question # 3

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

Question # 4

γ-rays behave like a particle because they explain the

Question # 5

Structure of the nucleus was explained by

Question # 6

A curie represents a very strong source of

Question # 7

The chemical behaviour of an atom is determined by

Question # 8

The range of particle depends upon the factor

Question # 9

Mass of proton is of order of

Question # 10

The most abundant isotope of neon is

Question # 11

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

Question # 12

The half life of uranium-238 is

Question # 13

The total charge of any nucleus is given as

Question # 14

Neutron was discovered in

Question # 15

Radioactivity

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Neutron was suggested to be in the nucleus by:
A. Rutherford in 1920
B. Bohar in 1913
C. Dirac in 1928
D. Anderson in 1932
2 Structure of the nucleus was explained by
A. J.J Thomson
B. Bohr
C. Millikan
D. Rutherford
3 The nucleus/nuclei of hydrogen is/are:
A. Proton
B. Deuteron
C. Triton
D. All of these
4 Radioactivity is
A. self disruptive activity
B. spontaneous activity
C. exhibited by all elements under proper conditions
D. both 'a' and 'b'
5 How many isotopes of helium are present?
A. 1
B. 2
C. 3
D. 4
6 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
7 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
8 The half life of radioactive substances depends upon
A. amount of substance
B. energy of substance
C. state of substance
D. temperature of substance
9 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
10 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

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