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

For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is

Question # 2

Mass of proton is of order of

Question # 3

Curie is a unit of

Question # 4

Beta particles are

Question # 5

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

Question # 6

Nucleon means:

Question # 7

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

Question # 8

The energy acquired by a mass of 1g moving with the speed of light is

Question # 9

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

Question # 10

In his experiment on nuclear reactions, Rutherford bombardedα particles on:

Question # 11

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

Question # 12

Alfa , beta and gamma rays are emitted from a radio-active substance

Question # 13

The number of isotopes of hydrogen are

Question # 14

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

Question # 15

The half lie of radium-226 is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Curie is a unit of
A. reluctance
B. resistivity
C. binding energy
D. radioactivity
2 The number of isotopes of hydrogen are
A. 2
B. 1
C. 3
D. 4
3 Rate of decay is actually described by.
A. Half line
B. Decay constant
C. Mean life
D. Total life
4 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
5 The number if neutrons in the nucleus of 92U235are
A. Infinite
B. 92
C. 235
D. 143
6 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
7 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
8 In radioactive decay, the new element which is formed due to the disintegration of original element is called
A. element
B. daughter element
C. parent element
D. none of these
9 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
10 The counter, which also provides the power to the G.M. tube is called:
A. Thin mica window
B. thin glass window
C. Airy window
D. Wooden window

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