The B-H curve for ________ is a straight line passing through the origin.
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Refers to the non- metallic materials that have the ferromagnetic properties of iron.
The magnetic flux through a coil changes. This results to the induced emf acting in a direction as to
The magnetic flux through a wire loop in a magnetic field does not d
What is the SI unit of reluctance?
One farad equals
The unit of electrical energy is
Why is it that the magnitude of magnetomotive force required for air gap is much greater than that required…
How is mutual inductance between two coils decreased?
Which of the following materials has the highest dielectric strength?
Electric potential is a _______ quantity.
Hysteresis is a phenomenon of _________ in a magnetic circuit.
The temperature coefficient of resistance of a conductor ______ with an increase in temperature.
Defined as a closed path in which magnetic induction or flux flows
The emf induced in a coil due to the change of its own flux linked with it is called
When a wire loop is rotated in a magnetic field the direction of the induced emf changes one in every…
Amorphous solid is also called
Residual magnetism refers to the flux densitya which exists in the iron core when the magnetic field…
The evaporation of electrons from a heated surface is called
The temperature coefficient of resistance of eureka is
Ohm's law cannot be applied to which material?
A positively charged body has
A factor used to correct for the electrostatic forces of the more distant ions in an ionic solid.
What is the unit of magnetomotive force?
The force acting on a unit n- pole placed at that point is called
One oersted (Oe) is equivalent to _____ Gb/cm.
When the relative permeability of a material is slightly more than 1a it is called ______ material.
The induced emf in a wire loop that is moved parallel to a uniform magnetic field is
Small voltages generated by a conductor with current in an external magnetic field.
Whenever a flux inking a coil or current changesa an emf is induced in it. This is known as
The branch of Engineering which deals with the magnetic effect of electric current is known as
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