Ohm's law can be used only to a _____ circuit or component.
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A one cubic cm of copper has how many free electrons at room temperature?
The energy stored in an electrostatic field or electromagnetic field is called
What principle states that each electron in an atom must have a different set of quantum numbers?
Who discovered that a current-carrying conductor would move when placed in a magnetic field?
One electron volt (1 eV) is equivalent to _____ joules
The temperature coefficient of resistance of semiconductors is
The resistance of a material is ____________ its area of cross-section.
The simplest type of atom to exist is the ______ atom.
The induced emf in a wire loop that is moved parallel to a uniform magnetic field is
The force acting on a pole of 5 Wb is 25 N. What is the intensity of the magnetic field?
The ability of a material to conduct magnetic flux through it.
This paper does not exhibit electricity because it contains the same number of
The mass of proton is __________ the mass of an electron.
Used to maintain strength of magnetic field
Steel is hard to magnetize because of its
If the distance between two magnetic poles decreases by 2 timesa the force between them
The flux density in an air-cored coil is 10^-3 Wb/m^2. With a cast iron core of relative permeability…
The ratio of the total flux (flux in iron path) to the useful flux (flux in air gap)
What is the reluctance of a magnetic path having a length of 2x 10^-3m and crosssectional area of 2.5…
Core materials of a good relay have _________ hysteresis loop.
Theory of ferromagnetic phenomena which assumes each atom is a permanent magnet which can turn freely…
A 6- V battery is connected across a solenoid of 100 turns having a resistance of 2 ?a Calculate the…
The air space between poles of magnets
What is the value of the absolute permittivity of air?
The permeability of a material having a flux density of 5 Wb/m^2 is 10^-5 H/m. What is the value of…
The magnetic materials should have a large hysteresis loss for one of the following applications.
What is the SI unit of reluctance?
Which of the following materials has the least hysteresis loop area?
Small voltages generated by a conductor with current in an external magnetic field.
Another term for corona discharge.
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