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 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 # 2

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

Question # 3

Maric Curie and Pieree Curie discovered two new radioactive elements, which are called

Question # 4

An alpha particle has a charge of

Question # 5

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

Question # 6

Marie curie and Pierre curie discovered:

Question # 7

Nucleus consists of

Question # 8

The rate of decay of a radioactive substance

Question # 9

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

Question # 10

Radioactivity was discovered by

Question # 11

A curie represents a very strong source of

Question # 12

Charge on proton is

Question # 13

Mass of proton is of order of

Question # 14

Referring to the above figure, we can say that of all the elements, the most stable element is

Question # 15

Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 In his experiment on nuclear reactions, Rutherford bombardedα particles on:
A. Nitrogen
B. Hydrogen
C. Lead
D. Oxygen
2 The time required for a radioactive material to decrease in active by one half is called
A. half time
B. half life
C. disintegration time
D. mean life
3 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
4 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
5 The half life of radioactive substances depends upon
A. amount of substance
B. energy of substance
C. state of substance
D. temperature of substance
6 Neon gas have three isotopes whose atomic numbers are
A. 20, 24 , 23
B. 20, 21 , 22
C. 20, 19 , 21
D. none of these
7 Beta particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
8 The unit of decay constant is
A. sex
B. sec2
C. sec-1
D. sec-2
9 Which of the following material has longer half life
A. radium
B. polonium
C. radium
D. uranium
10 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

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