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

00:00
Question # 1

γ-rays are

Question # 2

Heavy water is made of one oxygen atom and two atoms of:

Question # 3

Neon gas have three isotopes whose atomic numbers are

Question # 4

Beta particles are

Question # 5

Marie curie and Pierre curie discovered:

Question # 6

The most abundant isotope of neon is

Question # 7

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

Question # 8

For an atom having atomic number Z and atomic weight A, the charge on the nucleus is

Question # 9

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

Question # 10

Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:

Question # 11

Neutron was disvovered by:

Question # 12

If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by

Question # 13

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

Question # 14

When thorium nucleus emits aβ-particle, the daughter nucleus is called:

Question # 15

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 A mass spectrograph sort out
A. molecules
B. atoms
C. elements
D. isotopes
2 The number of isotopes of hydrogen are
A. 2
B. 1
C. 3
D. 4
3 When certain nucleus emits aβ-particles, is mass number:
A. Remain same
B. Increases by one
C. Decreases by one
D. Decreases by four
4 The half lie of radium-226 is
A. 238 years
B. 4.5 x 109days
C. 1620 years
D. 332 years
5 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
6 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
7 Alfa particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
8 The emission of radiations take place in elements, having charge number greater than
A. 109
B. 82
C. 69
D. 52
9 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
10 The rate of decay of a radioactive substance
A. decrease exponentially with time
B. decreases linearly with time
C. increases linearly with time
D. increases exponentially with time

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  • alishba rasheed

    alishba rasheed

    03 Mar 2018

    easy mcqs

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