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

After alpha decay the atomic number of the atom

Question # 2

The missing mass which is converted to energy in the formation of nucleus, is called

Question # 3

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

Question # 4

The total charge of any nucleus is given as

Question # 5

Structure of the nucleus was explained by

Question # 6

During the nuclear changes, the law/s of conservation that hold/s are that of:

Question # 7

The diameter of an atom is of the order

Question # 8

For an atom having atomic number Z and atomic weight A, the number of electron in an atoms

Question # 9

The chemical properties of all the isotopes of an elements are

Question # 10

When a nucleus emits an alpha particle, it atomic mass decreased by

Question # 11

The half life of radioactive substances depends upon

Question # 12

Charge on proton is

Question # 13

U-238 present in the natural uranium is about:

Question # 14

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

Question # 15

Three quarks make:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 γ-rays behave like a particle because they explain the
A. Compton effect
B. Photoelectric effect
C. Pair-production
D. all the above
2 The nuclei of an element having the same charge number but different mass numbers are called:
A. Isobars
B. Isotopes
C. Isomers
D. Isobaric
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 Neutrons are
A. positive charge
B. negatively charged
C. massless
D. neutral
5 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
6 The penetration power ofβ-particle is
A. zero
B. less thanα-particle
C. equal toα-particle
D. greater thanα-particle
7 A particle having the mass of electron and charge of a proton is called a
A. photon
B. position
C. antiproton
D. antineutrino
8 For an atom having atomic number Z and atomic weight A, the number of electron in an atoms
A. A - Z
B. A + Z
C. Z
D. A
9 The range ofβ-particle in air is greater than that ofα-particle by
A. 1000 times
B. 100 times
C. 15 times
D. 10 times
10 Proton was discovered by Rutherford in
A. 1915
B. 1906
C. 1910
D. 1920

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