Who discovered superconductivity in 1911?
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What is the main advantage of temporary magnets?
What is the SI unit of conductance?
The electric field intensity between the parallel plate air capacitor is 20 N/C. If an insulating slab…
The current of electric circuit is analogous to which quantity of a m
What is used as the insulating material or dielectric in an electric ion
Small voltages generated by a conductor with current in an external magnetic field.
A law that states that the polarity of the induced voltage will oppose the change in magnetic flux causing…
Hipernik is an alloy containing __________ iron and __________ nickel.
The reluctance of a magnetic circuit is not dependent on which of the following?
A permanent magnet does not exert a force on
Germanium atom has ______ protons and ______ electrons.
Which of the following materials has the highest dielectric strength?
The flux density in an air-cored coil is 10^-3 Wb/m^2. With a cast iron core of relative permeability…
A law establishing the fact that the algebraic su of the rises and drops of the mmf around a closed…
A group of magnetically aligned atoms is called
The reluctance of a magnetic circuit varies with
Used to maintain strength of magnetic field
What is the SI unit of conductivity?
__________ is a substance of whose molecules consist of the same kind of atom.
The temperature coefficient of resistance of conductors is
The permeability of a material having a flux density of 5 Wb/m^2 is 10^-5 H/m. What is the value of…
If a 20 V potential is applied across a relay coil with 50 turns having 1 ? of resistancea the total…
Electric field intensity is a ________.
The direction of force o a current carrying conductor placed in a m found by
A magnetic field is
Referred to as the specific reluctance of a material
A principle that states that only two electrons with different spins are allowed to exist in a given…
Electric potential is a _______ quantity.
Lenz's law is the consequence of the law of conservation of
______ is an electromagnet with its core in the form of a close magnetic ring.
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