This is a timed quiz. You will be given 1800 seconds to answer all questions. Are you ready?
1800
Which of the following is diamagnetic :
Correct! Wrong!
What is the SI unit of magnetic flux?
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!
If the distance between two similar magnetic poles held 1cm apart be doubled, the the force between the poles will be
Correct! Wrong!
which of the following is not a method of magnetization?
Correct! Wrong!
A magnet is moved a) Quickly . b) slowly towards a coil. The emf induced in the coil is :
Correct! Wrong!
Retentivity is maximum for:
Correct! Wrong!
Iron is ferromagnetic :
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!
When a magnet is heated, it
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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 magnitude of statically induced emf depends on the :
Correct! Wrong!
The unit of permeabilty is :
Correct! Wrong!
Two parallel wires carrying currents in opposite directions :
Correct! Wrong!
The relative permeability of Iron is of the order of :
Correct! Wrong!
Magnetic cores should have
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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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Working of Dynamo is based on :
Correct! Wrong!
which of the following is most suitable for the cores of electromagnet?
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Which of the following is Paramagnetic?
Correct! Wrong!
The principle of dynamically induced emf is utilized in :
Correct! Wrong!
The relative permeability of a material is 0.999. The substance is:
Correct! Wrong!
The relative permeabilty of free space is :
Correct! Wrong!
Which of the following is a ferromagnetic material?
Correct! Wrong!
mmf does not depend on :
Correct! Wrong!
Magnetism Quiz KSEB Sub Engineer
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