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

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

Question # 2

For Protium, the mass defect is:

Question # 3

Nucleus of a hydrogen atom may contain:

Question # 4

Pair production take place when energy ofγ-rays photon is

Question # 5

γ-rays behave like a particle because they explain the

Question # 6

Alfa , beta and gamma rays are emitted from a radio-active substance

Question # 7

Radium was discovered by:

Question # 8

The nucleus/nuclei of hydrogen is/are:

Question # 9

Radiation detector are used to

Question # 10

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

Question # 11

The penetration power ofβ-particle is

Question # 12

Mass of proton is

Question # 13

Examples of moderators used in a fission reactor is/are:

Question # 14

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 # 15

The rate of decay of radioactive substance

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 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
2 Curie is a unit of
A. reluctance
B. resistivity
C. binding energy
D. radioactivity
3 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
4 When certain nucleus emits aβ-particles, is mass number:
A. Remain same
B. Increases by one
C. Decreases by one
D. Decreases by four
5 Radioactivity was discovered by
A. Rutherford
B. Henri Becqureal
C. Maxwell
D. James Chadwick
6 Rate of decay is actually described by.
A. Half line
B. Decay constant
C. Mean life
D. Total life
7 γ-rays behave like a particle because they explain the
A. Compton effect
B. Photoelectric effect
C. Pair-production
D. all the above
8 Neutron was disvovered by:
A. Rutherford in 1920
B. Chadwick in 1922
C. Bohr in 1913
D. Compton in 1927
9 The number of all the protons and neutrons in a nucleus is known as
A. atomic number
B. mass number
C. charge number
D. none of these
10 Maric Curie and Pieree Curie discovered two new radioactive elements, which are called
A. polonium uranium
B. uranium and radium
C. polonium and radium
D. none of these

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