More Classes
5th Class
6th Class
7th Class
8th Class
9th Class
10th Class
11th Class
12th Class
NAT I
NAT II
CSS
IQ
General Knowledge
MDCAT
ECAT
GAT General
GAT Subject
Other Links
Go to Home
Online Tests
Physics ECAT Pre Engineering Chapter 21 Nuclear Physics Physics Online Test MCQs With Answers
Question # 1
The diameter of an atom is of the order
Choose an answer
10
-125
m
10
-11
m
10
-10
m
10
-9
m
Previous
Skip
Next
Question # 2
Alfa , beta and gamma rays are emitted from a radio-active substance
Choose an answer
spontaneously
when it is heated
when it is exposed to light
When it interacts with the other particle
Previous
Skip
Next
Question # 3
The distance travelled by
α-particle in a medium before coming to rest, is called
Choose an answer
range of
γ-particle
range of neutrons
range of particle
none of these
Previous
Skip
Next
Question # 4
Hydrogen atom with only one proton and one neutron in its nucleus, and one electron, is called
Choose an answer
deuterium
protium
tritium
none of these
Previous
Skip
Next
Question # 5
Phenomenon of radioactivity is due to disintegration of
Choose an answer
nucleus
neutron
proton
molecule
Previous
Skip
Next
Question # 6
Mass of proton is
Choose an answer
1.67 x 10
-27
kg
1.67 x 10
-31
kg
1.66 x 10
-34
kg
1.67 x 10
-17
kg
Previous
Skip
Next
Question # 7
Neon gas have three isotopes whose atomic numbers are
Choose an answer
20, 24 , 23
20, 21 , 22
20, 19 , 21
none of these
Previous
Skip
Next
Question # 8
Three quarks make:
Choose an answer
An electron
A meson
A baryon
A photon
None of these
Previous
Skip
Next
Question # 9
1 amu is equal to.
Choose an answer
1.66 x 10
-24
kg
1.66 x 10
-19
kg
1.66 x 10
-24
kg
1.66 x 10
-27
kg
Previous
Skip
Next
Question # 10
Charge on proton is
Choose an answer
1.59 x 10
-9
C
1.59 x 10
-7
C
-1.59 x 10
-19
C
1.59 x 10
-19
C
Previous
Skip
Next
Question # 11
Which of these is not a radiation detector
Choose an answer
Wilson cloud chamber
cyclotron acceleration
Geiger Miller counter
solid state detector
Previous
Skip
Next
Question # 12
Curie is a unit of
Choose an answer
reluctance
resistivity
binding energy
radioactivity
Previous
Skip
Next
Question # 13
γ-rays behave like a particle because they explain the
Choose an answer
Compton effect
Photoelectric effect
Pair-production
all the above
Previous
Skip
Next
Question # 14
Nucleus of a hydrogen atom may contain:
Choose an answer
One neutron only
Two protons and one neutron
Two protons and two neutrons
Aany of above
One proton only
Previous
Skip
Next
Question # 15
The half life of uranium-238 is
Choose an answer
6.2 x 10
9
years
4.5 x 10
9
days
4.5 x 10
9
years
1.3 x 10
6
years
Previous
Skip
Next
Question # 16
The half lie of radium-226 is
Choose an answer
238 years
4.5 x 10
9
days
1620 years
332 years
Previous
Skip
Next
Back