Related Questions
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The uncharged particles which have no effect on its atomic charge.
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The emission of electrons from hot bodies is called
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A current if flowing east along a power line. If the earth's field is neglecteda the direction of the magnetic field below it is
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The reluctance of the magnetic circuit is ________ relative permeability of the material comprising the circuit.
A. directly proportional to
B. inversely proportional to
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What is the diameter of an atom?
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Who demonstrated the theory of electromagnetic induction in 1831?
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What is another name for relative permittivity?
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A magnetizing force of 1000 AT/m will produce a flux density of __________ i
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Electrons at the outer shell are called
C. Semiconductor electrons
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How many electrons are needed in the valence orbit to give a material's stability?
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If the value of 25 of a conductor is 1/230 per oCa then the value of 0is
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The magnetic flux through a wire loop in a magnetic field does not d
B. The magnitude of the field
D. The angle between the plane of the loop and the direction
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Electric field intensity at a point is numerically equal to ________ at that point.
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If on looking at any one end of a solenoid; the direction of current flow is found to be clockwise then the end under observation is a south pole. This is known as
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A permanent magnet does not exert a force on
A. an unmagnetized iron bar
C. a moving electric charge
D. a stationary electric charge
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When the current flowsa the magnetic field ��. conductor is in what direction?
A. The same as the current direction
B. Opposite the current direction
D. In the direction determined by the left hand rule
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What is the unit of reluctance?
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The idea of preventing one component from affecting another through their common electric and magnetic field is referred to as
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The unit of electrical energy is
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The temperature coefficient of resistance of a conductor ______ with an increase in temperature.
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The force between two magnetic poles is _______ their pole strengths.
A. directly proportional to
C. inversely proportional to
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Electronic current in a wire is the flow of ____________ electrons.
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An atom or a group of atoms that carries a net electric charge.
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Residual magnetism refers to the flux densitya which exists in the iron core when the magnetic field intensity is
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Amorphous solid is also called
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Who developed the electromagnetic theory of light in 1862?
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Electric potential is a _______ quantity.
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The permittivity of a material is given by one of the following formulas.
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An alloy of 40 percent iron and 60 percent nickel.
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What is used as the dielectric material in high voltage transformers?