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 half lie of radium-226 is

Question # 2

The total charge of any nucleus is given as

Question # 3

The half life of radioactive substances depends upon

Question # 4

The emission of radiations take place in elements, having charge number greater than

Question # 5

Rate of decay is actually described by.

Question # 6

Radioactivity was discovered by:

Question # 7

A pair of quark and antiquark makes a:

Question # 8

Charge on proton is

Question # 9

Neutron was discovered by

Question # 10

When certain nucleus emits aβ-particles, is mass number:

Question # 11

The unit of decay constant is:

Question # 12

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

Question # 13

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 # 14

Mass of neutron is

Question # 15

The half life of uranium-238 is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The half life of radioactive substances depends upon
A. amount of substance
B. energy of substance
C. state of substance
D. temperature of substance
2 The unit of decay constant is:
A. Second
B. Metre
C. Hour
D. Year
3 Electrons are
A. positive charged
B. negatively charged
C. massless
D. neutral
4 The number if neutrons in the nucleus of 92U235are
A. Infinite
B. 92
C. 235
D. 143
5 Neutron was discovered by
A. Curie
B. Roentgen
C. Chadwick
D. Rutherford
6 When radioactive nucleus emits aβ-particle, the proton-neutron ratio
A. decrease
B. increase
C. same
D. none of these
7 The chemical behaviour of an atom is determined by
A. binding energy
B. atomic number
C. mass number
D. number of isotopes
8 Nucleus of a hydrogen atom may contain:
A. One neutron only
B. Two protons and one neutron
C. Two protons and two neutrons
D. Aany of above
9 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
10 A mass spectrograph sort out
A. molecules
B. atoms
C. elements
D. isotopes

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