An atom or a group of atoms that carries a net electric charge.
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A one cubic cm of copper has how many free electrons at room temperature?
Refers to the non- metallic materials that have the ferromagnetic properties of iron.
The simplest type of atom to exist is the ______ atom.
A factor used to correct for the electrostatic forces of the more distant ions in an ionic solid.
If a 20 V potential is applied across a relay coil with 50 turns having 1 ? of resistancea the total…
Under ordinary conditionsa a body is considered
A t/m is a unit of
Hydrogen is an example of a _____ material.
The uncharged particles which have no effect on its atomic charge.
The induced emf in a wire loop that is moved parallel to a uniform magnetic field is
Cobalt is an example of a ______ material.
The ratio of the total flux (flux in iron path) to the useful flux (flux in air gap)
The customary energy unit in atomic and nuclear physics is
Which of the following electric quantities is vector in character?
The reluctance of a magnetic circuit is not dependent on which of the following?
A good conductor has how many valence electrons?
The point in a magnet where the intensity of magnetic lines of force is maximum
The net electrical charge in an isolated system remains constant. This is known as
Electrons at the outer shell are called
Which of the following materials has the least hysteresis loop area?
The electric potential at a point in air due to a charge is 21 V. If the air is replaced by a medium…
The magnitude of the induced emf in a coil is directly proportional to the rate of change of flux linkages.…
A length of wire has a resistance of 10 ohms. What is the resistance of a wire of the same material…
The relation between absolute permittivity of air ( 0)a absolute p and velocity of light (c) is given…
Temporary magnets are commonly employed in
Magnetic fields do not interact with
When the relative permeability of a material is slightly less than 1a it is called _____ material.
If the right handed bottle-opener cork screw is assumed to be along the conductor so as to advance in…
Which of the following is a vector quantity?
The electrons in the last orbit of an atom are called _______ electrons.
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