This is a timed quiz. You will be given 1800 seconds to answer all questions. Are you ready?
1800
mmf does not depend on :
Correct! Wrong!
The current through a coil of inductance 5 H is decreasing at the rate of 2 A/sec. The emf induced in the coil is :
Correct! Wrong!
A long solenoid with 2000 turns is 0.8 m long . What is the magnetizing force in the centre of this solenoid, if the exciting current is 2 A?
Correct! Wrong!
Two coils of inductances L1 and L2 are placed close together such that magnetic flux in one coil completely links the other. The mutual inductance between the coils is :
Correct! Wrong!
The unit of permeabilty is :
Correct! Wrong!
The principle of dynamically induced emf is utilized in :
Correct! Wrong!
What is the SI unit of magnetic flux?
Correct! Wrong!
Iron is ferromagnetic :
Correct! Wrong!
Two parallel wires carrying currents in opposite directions :
Correct! Wrong!
which of the following is most suitable for the cores of electromagnet?
Correct! Wrong!
which of the following is not a method of magnetization?
Correct! Wrong!
If the distance between two similar magnetic poles held 1cm apart be doubled, the the force between the poles will be
Correct! Wrong!
The relative permeability of a material is 0.999. The substance is:
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Working of Dynamo is based on :
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When a magnet is heated, it
Correct! Wrong!
Magnetic cores should have
Correct! Wrong!
The relative permeability of Iron is of the order of :
Correct! Wrong!
The magnitude of statically induced emf depends on the :
Correct! Wrong!
Retentivity is maximum for:
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Which of the following is Paramagnetic?
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The relative permeabilty of free space is :
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A coil of radius R has 400 turns and a self-inductance of 32 mH .What will be the inducatnace of a similar coil of 300 turns?
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Which of the following is diamagnetic :
Correct! Wrong!
Which of the following is a ferromagnetic material?
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A magnet is moved a) Quickly . b) slowly towards a coil. The emf induced in the coil is :
Correct! Wrong!
Magnetism Quiz KSEB Sub Engineer
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