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Q 1.
Name the principle that works on electric generator?
Ans.
Electromagne induction.
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Q 2.
Name the methods of producing magnetic field?
Ans.
1.Current carrying conductor
2.Permanent magnet 3.Electromagnet. |
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Q 3.
The magnetic field inside the solenoid is?
Ans.
Same at all points.
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Q 4.
Name the device that generates current and changes direction after equal intervals of time?
Ans.
AC generator.
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Q 5.
The direction of the induced current changes once in a each rectangular coil of copper wire is rotated in a magnetic?
Ans.
Half revolution.
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Q 6.
Name the device which produces unidirectional current?
Ans.
DC generator.
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Q 7.
Which property of a proton can change while it moves freely in a magnetic field?
Ans.
Velocity and momentum.
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Q 8.
Name the thing that acts as commutator,in electric motor?
Ans.
Split ring.
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Q 9.
Name the person who discovered law of electrolysis?
Ans.
Michael Faraday.
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Q 10.
Which wire is called earth wire?
Ans.
Wire with green insulation.
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Q 11.
Which wire is called a neutral wire?
Ans.
Wire with black insulation.
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Q 12.
What are the main difference between AC and DC generator?
Ans.
AC generator has slip rings while DC generator has commutator.
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Q 13.
Name the safety measures that is commonly used in electric circuit and appliances?
Ans.
Earth wire and Electrical fuse.
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Q 14.
What is called an armature?
Ans.
The soft iron and coils.
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Q 15.
Name the person who invented transformer?
Ans.
Michael Faraday.
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Q 16.
Name the metal that is used for making of an electromagnet?
Ans.
Soft iron.
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Q 17.
Define generator?
Ans.
The device used for producing electric current is called a generator.
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Q 18.
Name the wire that is usually the live wire of an electric supply?
Ans.
A wire with a red insulation.
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Q 19.
What is the unit of magnetic field strength?
Ans.
Oersted.
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Q 20.
How an electric current carrying wire behaves like a?
Ans.
Magnet.
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