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

00:00
Question # 1

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

Question # 2

The half lie of radium-226 is

Question # 3

Charge on proton is

Question # 4

The isotope/s of hydrogen is /are:

Question # 5

Binding energy per nucleus is

Question # 6

Rate of decay is actually described by.

Question # 7

U-238 present in the natural uranium is about:

Question # 8

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

Question # 9

Radioactivity was discovered by

Question # 10

Which of the following material has smaller has life

Question # 11

A pair of quark and antiquark makes a:

Question # 12

γ-rays behave like a particle because they explain the

Question # 13

Different radioactive material have

Question # 14

The nucleus/nuclei of hydrogen is/are:

Question # 15

If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Charge on proton is
A. 1.59 x 10-9C
B. 1.59 x 10-7C
C. -1.59 x 10-19 C
D. 1.59 x 10-19C
2 Pair production take place when energy ofγ-rays photon is
A. equal to 1.02 Mev-
B. greater than 1.02 Mev
C. less than 1.02 Mev
D. none of these
3 A curie represents a very strong source of
A. α-particle
B. β-particle
C. γ-particle
D. none of these
4 Radioactivity
A. is exhibited more by semiconductors in general
B. in exhibited more by the element when they are coupled
C. with other radioactive elements by a covalent bond
D. is an atomic property of radioactive elements
5 The range ofβ-particle in air is greater than that ofα-particle by
A. 1000 times
B. 100 times
C. 15 times
D. 10 times
6 Radioactivity is
A. self disruptive activity
B. spontaneous activity
C. exhibited by all elements under proper conditions
D. both 'a' and 'b'
7 Proton was discovered by Rutherford in
A. 1915
B. 1906
C. 1910
D. 1920
8 Neutron was discovered by
A. Curie
B. Roentgen
C. Chadwick
D. Rutherford
9 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
10 Neutrons are
A. positive charge
B. negatively charged
C. massless
D. neutral

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