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

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

Question # 2

The time required for a radioactive material to decrease in active by one half is called

Question # 3

Curie is a unit of

Question # 4

The chemical properties of an element depends upon the number of

Question # 5

Radioactivity was discovered by:

Question # 6

After alpha decay the atomic number of the atom

Question # 7

Structure of the nucleus was explained by

Question # 8

The number of isotopes of hydrogen are

Question # 9

1 amu is equal to

Question # 10

Radiation detector are used to

Question # 11

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

Question # 12

Neutrons are

Question # 13

Phenomenon of radioactivity is due to disintegration of

Question # 14

The energy is found from Einstein's mass energy relation is called

Question # 15

The unit of decay constant is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 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
2 The chemical properties of an element depends upon the number of
A. electron
B. position
C. photons
D. neutrons
3 The total charge of any nucleus is given as
A. Ze2
B. Z2e
C. Z/e
D. Ze
4 Radium was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. Rutherford
5 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
6 The half life of uranium-238 is
A. 6.2 x 109years
B. 4.5 x 109days
C. 4.5 x 109years
D. 1.3 x 106years
7 An alpha particle has a charge of
A. +2e
B. -2e
C. -e
D. +3e
8 The figure 1.007276μ shows the mass of an:
A. Atom
B. Positron
C. Electron
D. Neutron
9 The number if neutrons in the nucleus of 92U235are
A. Infinite
B. 92
C. 235
D. 143
10 1 amu is equal to.
A. 1.66 x 10-24kg
B. 1.66 x 10-19kg
C. 1.66 x 10-24kg
D. 1.66 x 10-27kg

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