ECAT Pre Engineering Physics Chapter 21 MCQ Test With Answer

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

Binding energy per nucleus is

Question # 2

The chemical properties of an element depends upon the number of

Question # 3

Gamma rays consist of steam of

Question # 4

Radioactivity

Question # 5

The number of protons inside a nucleus is called

Question # 6

A mass difference of 0.0012 u is equivalent to and energy of:

Question # 7

When certain nucleus emits anα particle, its mass number:

Question # 8

When a nucleus emits an alpha particles, its charge number decreases by

Question # 9

In wilson cloud chamber, the air becomes saturated with:

Question # 10

When radioactive nucleus emits aβ-particle, the proton-neutron ratio

Question # 11

Heavy water is made of one oxygen atom and two atoms of:

Question # 12

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

Question # 13

For Protium, the mass defect is:

Question # 14

Pair production take place when energy ofγ-rays photon is

Question # 15

When thorium nucleus emits aβ-particle, the daughter nucleus is called:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Referring to the above figure, we can say that of all the elements, the most stable element is
A. Phosphours
B. Iron
C. uranium
D. Lithium
2 In 1932 Chadwick discovered
A. proton
B. neutron
C. photon
D. electron
3 Mass of proton is of order of
A. 10-31gm
B. 10-27kg
C. 10-24gm
D. 10+27kg
4 The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains
A. 3 more neutrons
B. 3 more electrons
C. 3 more protons
D. 3 more ions
5 Curie is a unit of
A. reluctance
B. resistivity
C. binding energy
D. radioactivity
6 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
7 The counter, which also provides the power to the G.M. tube is called:
A. Thin mica window
B. thin glass window
C. Airy window
D. Wooden window
8 Beta particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
9 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
A. nuclear fission
B. nuclear fusion
C. man defect
D. radioactivity
10 Heavy water is made of one oxygen atom and two atoms of:
A. Protium
B. Deuterium
C. Tritium
D. Any of these

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