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 figure 1.007276μ shows the mass of an:

Question # 2

The nucleus left after the emission of some radiation is called:

Question # 3

The isotope/s of hydrogen is /are:

Question # 4

Mass of proton is of order of

Question # 5

Different radioactive material have

Question # 6

The unit of decay constant is

Question # 7

In wilson cloud chamber, the air becomes saturated with:

Question # 8

After alpha decay the atomic number of the atom

Question # 9

Fraction of the decaying atoms per unit time is called

Question # 10

The amount of energy equivalent to 1 a.m.u is

Question # 11

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

Question # 12

The distance travelled byα-particle in a medium before coming to rest, is called

Question # 13

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 # 14

A pair of quark and antiquark makes a:

Question # 15

Neutron was discovered by

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The reciprocal of decay constant λ of a radioactive material is:
A. Frequency
B. Half life
C. Year
D. Mean life
2 The half life of radioactive substances depends upon
A. amount of substance
B. energy of substance
C. state of substance
D. temperature of substance
3 A mass spectrograph sort out
A. molecules
B. atoms
C. elements
D. isotopes
4 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m
5 Radiation detector are used to
A. measure intensity of radiation
B. measure energy of radiation
C. difference between different types of radiation
D. all the above
6 How many isotopes of helium are present?
A. 1
B. 2
C. 3
D. 4
7 Nuclei that have the same charge number but different mass number are called
A. isotones
B. isomers
C. isotopes
D. isobars
8 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
9 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
10 The nucleus left after the emission of some radiation is called:
A. Parent nucleus
B. Daughter necleus
C. Mother necleus
D. Any of these

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