Question 1.
Which sources produce alternating current (AC)?
A. Solar power plants
B. Hydro-electric generators
C. Batteries
D. All of the above
Ans: B. Hydro-electric generators
Question 2.
Which compressor is usually used in AC?
A. Centrifugal
B. Rotary
C. Reciprocating
D. Axial
Ans: C. Reciprocating
Question 3.
According to Rutherford’s atomic model, the
electrons inside an atom are
A. Centralized
B. Not Stationary
C. Stationary
D. None of these
Ans: B. Not Stationary
Question 4.
The wave like properties of electrons are useful in
A. Magnifying objects
B. Lasers
C. Weather reports
D. All of the above
Ans: A. Magnifying objects
Question 5.
Alternating current is converted into direct current
by a
A. Transformer
B. Dynamo
C. Oscillator
D. Rectifier
Ans: D. Rectifier
Question 6.
The best material for the core of a transformer is
A. Stainless steel
B. Mild steel
C. Hard steel
D. Soft iron
Ans: D. Soft iron
Question 7.
Electrons carry a
A. Positive Charge
B. Negative Charge
C. Variable Charge
D. Neutral Charge
Ans: B. Negative Charge
Question 8.
Who indirectly determined the mass of the electron
by measuring the charge of the electron?
A. Thomson
B. Millikan
C. Rutherford
D. Einstein
Ans: B. Millikan
Question 9.
Speed regulation of synchronous motor is
A. 1%
B. 25%
C. Zero
D. 0.5%
Ans: C. Zero
Question 10.
A transformer works on the principle of
A. Self induction
B. Mutual induction
C. Generator
D. Inverter
Ans: B. Mutual induction
Question 11.
An atom with more neutrons than protons is called
A. Compound
B. Element
C. Isotope
D. None of the above
Ans: C. Isotope
Question 12.
When an atom loses an electron it becomes
A. Neutron
B. Negative ion
C. Positive ion
D. None of the above
Ans: C. Positive ion
Question 13.
A parallel-plate capacitor,with air in between the
plates, has capacitance C. Now the space between the
two plates of the capacitor is filled with a
dielectric of dielectric constant 7. Then the value
of the capacitance will become
A. C
B. C/7
C. 7C
D. 14C
Ans: C. 7C
Question 14.
Transformer is a device to convert
A. D.C. to A.C.
B. Low voltage D.C. into high voltage D.C.
C. Low voltage A.C. into high voltage A.C.
D. Mechanical energy into Electrical energy
Ans: C. Low voltage A.C. into high voltage A.C.
Question 15.
What part of the atom has a positive charge?
A. Neutron
B. Proton
C. Electron
D. All the above
Ans: B. Proton
Question 16.
What is the size of Electron as comapared to Proton
and Neutron?
A. 1/355
B. 1/1236
C. 1/1836
D. 1/1923
Ans: C. 1/1836
Question 17.
A parallel-plate capacitor of capacitance C1 is made
using two gold plates. Another parallel-plate
capacitor of capacitance C2 is made using two
aluminium plates with same plate separation, and all
the four plates are of same area. If rg and ra are
respectively the electrical resistivities of gold
and aluminium, then which one of the following
relations is correct?
A. C1>C2
B. C2>C1
C. C1pa = C2pg
D. C1 = C2
Ans: D. C1 = C2
Question 18.
Atomic hydrogen has a life period of
A. One hour
B. One day
C. One minute
D. A fraction of a second
Ans: D. A fraction of a second
Question 19.
Who was the first scientist to discover Electrons?
A. Albert Einstein
B. Isaac Newton
C. J.C. Bose
D. J.J Thompson
Ans: D. J.J Thompson
Question 20.
The force that binds the neutrons and protons in a
nucleus is called as:
A. Weak Nuclear Force
B. Strong Nuclear Force
C. Electromagnetic Force
D. Gravitational Force
Ans: B. Strong Nuclear Force
Physics GK MCQs all set
- Physics MCQs Set-1
- Physics MCQs Set-2
- Physics MCQs Set-3
- Physics MCQs Set-4
- Physics MCQs Set-5
- Physics MCQs Set-6
- Physics MCQs Set-7
- Physics MCQs Set-8
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- Physics MCQs Set-10
- Physics MCQs Set-11
- Physics MCQs Set-12
- Physics MCQs Set-13
- Physics MCQs Set-14
- Physics MCQs Set-15
- Physics MCQs Set-16
- Physics MCQs Set-17
- Physics MCQs Set-18
- Physics MCQs Set-19
- Physics MCQs Set-20
- Physics MCQs Set-21
- Physics MCQs Set-22
- Physics MCQs Set-23
- Physics MCQs Set-24
- Physics MCQs Set-25
- Physics MCQs Set-26
- Physics MCQs Set-27
- Physics MCQs Set-28
- Physics MCQs Set-29
- Physics MCQs Set-30
- Physics MCQs Set-31
- Physics MCQs Set-32
- Physics MCQs Set-33
- Physics MCQs Set-34
- Physics MCQs Set-35
- Physics MCQs Set-36
- Physics MCQs Set-37
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- Physics MCQs Set-39
- Physics MCQs Set-40
- Physics MCQs Set-41
- Physics MCQs Set-42
- Physics MCQs Set-43
- Physics MCQs Set-44
- Physics MCQs Set-45
- Physics MCQs Set-46
- Physics MCQs Set-47
- Physics MCQs Set-48
- Physics MCQs Set-49
- Physics MCQs Set-50
- Physics MCQs Set-51
- Physics MCQs Set-52
- Physics MCQs Set-53
- Physics MCQs Set-54
- Physics MCQs Set-55
- Physics MCQs Set-56
- Physics MCQs Set-57
- Physics MCQs Set-58
- Physics MCQs Set-59
- Physics MCQs Set-60
- Physics MCQs Set-61
- Physics MCQs Set-62
- Physics MCQs Set-63
- Physics MCQs Set-64
- Physics MCQs Set-65
- Physics MCQs Set-66
- Physics MCQs Set-67
- Physics MCQs Set-68
- Physics MCQs Set-69
- Physics MCQs Set-70
- Physics MCQs Set-71
- Physics MCQs Set-72
- Physics MCQs Set-73
- Physics MCQs Set-74
- Physics MCQs Set-75
- Physics MCQs Set-76
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