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!
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!
Working of Dynamo is based on :
Correct! Wrong!
which of the following is most suitable for the cores of electromagnet?
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!
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?
Correct! Wrong!
The magnitude of statically induced emf depends on the :
Correct! Wrong!
Retentivity is maximum for:
Correct! Wrong!
The unit of permeabilty 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!
mmf does not depend on :
Correct! Wrong!
What is the SI unit of magnetic flux?
Correct! Wrong!
Magnetic cores should have
Correct! Wrong!
The relative permeability of Iron is of the order of :
Correct! Wrong!
Which of the following is Paramagnetic?
Correct! Wrong!
When a magnet is heated, it
Correct! Wrong!
The relative permeabilty of free space is :
Correct! Wrong!
The relative permeability of a material is 0.999. The substance is:
Correct! Wrong!
A magnet is moved a) Quickly . b) slowly towards a coil. The emf induced in the coil is :
Correct! Wrong!
Two parallel wires carrying currents in opposite directions :
Correct! Wrong!
Iron is ferromagnetic :
Correct! Wrong!
which of the following is not a method of magnetization?
Correct! Wrong!
The principle of dynamically induced emf is utilized in :
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!
Which of the following is a ferromagnetic material?
Correct! Wrong!
Magnetism Quiz KSEB Sub Engineer
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