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

The half lie of radium-226 is

Question # 2

The emission of radiations take place in elements, having charge number greater than

Question # 3

A curie represents a very strong source of

Question # 4

The reciprocal of decay constant λ of a radioactive material is:

Question # 5

The number of all the protons and neutrons in a nucleus is known as

Question # 6

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

Question # 7

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

Question # 8

Three quarks make:

Question # 9

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

Question # 10

Different radioactive material have

Question # 11

Rate of decay is actually described by.

Question # 12

The chemical properties of an element depends upon the number of

Question # 13

The rate of decay of radioactive substance

Question # 14

The number of isotopes of hydrogen are

Question # 15

Nucleon means:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
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
A. Equal to 1
B. Less than 1
C. Greater than 1
D. Infinity
2 Heavy water is made of one oxygen atom and two atoms of:
A. Protium
B. Deuterium
C. Tritium
D. Any of these
3 Mass of proton is of order of
A. 10-31gm
B. 10-27kg
C. 10-24gm
D. 10+27kg
4 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
5 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
6 A particle having the mass of electron and charge of a proton is called a
A. photon
B. position
C. antiproton
D. antineutrino
7 A curie represents a very strong source of
A. α-particle
B. β-particle
C. γ-particle
D. none of these
8 The amount of energy equivalent to 1 a.m.u is
A. 9.315 Mev
B. 93.15 Mev
C. 931.5 Mev
D. 2.22 Mev
9 The chemical properties of all the isotopes of an elements are
A. same
B. different
C. slightly different
D. none of these
10 Charge on proton is
A. 1.59 x 10-9C
B. 1.59 x 10-7C
C. -1.59 x 10-19 C
D. 1.59 x 10-19C

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