ECAT Pre Engineering Physics Chapter 21 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 21 Nuclear Physics

Try The 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

If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be

Question # 2

The range ofβ-particle in air is greater than that ofα-particle by

Question # 3

Neutron was disvovered by:

Question # 4

Rate of decay is actually described by.

Question # 5

The total charge of any nucleus is given as

Question # 6

Nucleus of a hydrogen atom may contain:

Question # 7

Neutron was discovered in

Question # 8

The isotope/s of hydrogen is /are:

Question # 9

How much time, theα-particle more massive than an electron

Question # 10

Mass of proton is of order of

Question # 11

U-238 present in the natural uranium is about:

Question # 12

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

Question # 13

Which of these is not a radiation detector

Question # 14

The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains

Question # 15

Radioactivity was discovered by

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 When certain nucleus emits aβ-particles, is mass number:
A. Remain same
B. Increases by one
C. Decreases by one
D. Decreases by four
2 The energy is found from Einstein's mass energy relation is called
A. binding energy of electron
B. binding energy of proton
C. binding energy of neutron
D. binding energy of nucleus
3 Pair production take place when energy ofγ-rays photon is
A. equal to 1.02 Mev-
B. greater than 1.02 Mev
C. less than 1.02 Mev
D. none of these
4 The distance travelled byα-particle in a medium before coming to rest, is called
A. range ofγ-particle
B. range of neutrons
C. range of particle
D. none of these
5 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m
6 For an atom having atomic number Z and atomic weight A, the charge on the nucleus is
A. A - Z
B. A + Z
C. Z
D. A
7 Nucleus of a hydrogen atom may contain:
A. One neutron only
B. Two protons and one neutron
C. Two protons and two neutrons
D. Aany of above
8 The range of particle depends upon the factor
A. charge, mass and energy of particle
B. density of medium
C. ionization potential of the atoms
D. all the above
9 Electrons are
A. positive charged
B. negatively charged
C. massless
D. neutral
10 U-238 present in the natural uranium is about:
A. 59%
B. 0.007%
C. 99%
D. 39%

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