Hi friends, these are some of the multiple choice questions on electrical and magnetic properties. These are some of the basic questions which are asked in previous competitive papers check out and comment...
l) Core materials of a good relay have hysteresis loop.
A) large
B) narrow
C) very large
D) very narrow
Ans:B
2) The magnetic materials should have a large hysteresis loss for one of the following applications.
A) Transformers
B) AC motors
C) Permanent Magnets
D) DC generators
Ans:C
3) If the magnetic material is located within a coil through which alternating current (60 Hz frequency) flows, then hysteresis loops will be formed every second.
A) 60
B) 120
C) 30
D) 180
Ans:A
4) There are how many compounds available in nature?
A) 105
B) 1000
C) 300,000
D) Unlimited
Ans:D
5) Hysteresis is a phenomenon of in a magnetic circuit
A) setting up constant flux
B) lagging of H behind B
C) lagging of B behind H
D) leading B ahead H
Ans:C
6) What is the measure of the density and sign of the electric charge at a point relative to that at some time?
A) Electric potential
B) Electric charge
C) Electric current
D) Electric intensity
Ans:A
7) ........................is a substance of whose molecules consist of the same kind of atom
A) Mixture
B) Compound
C) Element
D) Isotope
Ans:C
8) Hipernik is an alloy containing.............. iron and.................. nickel
A) 40% ; 60%
B) 60% ; 40%
C) 50% ; 50%
D) 70% ; 30%
Ans:A
9) The mass of proton is.......................the mass of an electron
A) equal to
B) about 1837 times
C) less than
D) 200 times
Ans:B
10) What is the maximum number of electrons that can be accommodated in the last orbit of an atom?
A) 4
B) 2
C) 8
D) 18
Ans:C
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l) Core materials of a good relay have hysteresis loop.
A) large
B) narrow
C) very large
D) very narrow
Ans:B
2) The magnetic materials should have a large hysteresis loss for one of the following applications.
A) Transformers
B) AC motors
C) Permanent Magnets
D) DC generators
Ans:C
3) If the magnetic material is located within a coil through which alternating current (60 Hz frequency) flows, then hysteresis loops will be formed every second.
A) 60
B) 120
C) 30
D) 180
Ans:A
4) There are how many compounds available in nature?
A) 105
B) 1000
C) 300,000
D) Unlimited
Ans:D
5) Hysteresis is a phenomenon of in a magnetic circuit
A) setting up constant flux
B) lagging of H behind B
C) lagging of B behind H
D) leading B ahead H
Ans:C
6) What is the measure of the density and sign of the electric charge at a point relative to that at some time?
A) Electric potential
B) Electric charge
C) Electric current
D) Electric intensity
Ans:A
7) ........................is a substance of whose molecules consist of the same kind of atom
A) Mixture
B) Compound
C) Element
D) Isotope
Ans:C
8) Hipernik is an alloy containing.............. iron and.................. nickel
A) 40% ; 60%
B) 60% ; 40%
C) 50% ; 50%
D) 70% ; 30%
Ans:A
9) The mass of proton is.......................the mass of an electron
A) equal to
B) about 1837 times
C) less than
D) 200 times
Ans:B
10) What is the maximum number of electrons that can be accommodated in the last orbit of an atom?
A) 4
B) 2
C) 8
D) 18
Ans:C
If you like my post please share it with your friends and subscribe to latest updates.. If you have doubts you can start new topic on forum and start discussion with our readers..
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