Related Questions
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What revolves about the positive nucleus in a definite orbit?
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What is the other name for dielectric strength?
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The magnetic field around the conductor is determined by the
C. Current divided by the resistance
D. Resistance divided by the current
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The unit of flux is _____ in cgs system.
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The electric flux density is a ________ quantity.
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Small voltages generated by a conductor with current in an external magnetic field.
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A theorem which states that an electric current flowing in a circuit produces a magnetic field at external points equivalent to that due to a magnetic shell whose bounding edge is the conductor and whose strength of the current.
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Which of the following is a diamagnetic material?
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Calculate the flux density that will be produced by the field intensity of 2000 a. t/m for a permeability of 126 x 10^-6 T/A.t/m
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Which of the following materials has permeability slightly less than that of free space?
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Which element has four valence electrons?
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The hot resistance of an incandescent lamp is about _______ its cold resistance.
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A law that states that the current in a thermionic diode varies directly with the three- halves power of anode voltage and inversely with the square of the distance between the electrodesa provided operating conditions are such that the current is limited only by the space charge.
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An electron- volt (eV) is a unit of
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All matters (gasa liquid and solid) are composed of
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When a wire loop is rotated in a magnetic field the direction of the induced emf changes one in every _______ revolution
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The magnitude of the induced emf in a coil is directly proportional to the rate of change of flux linkages. This is known as
B. Faraday's second law of electromagnetic induction
C. Faraday's first law of electromagnetic induction
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This paper does not exhibit electricity because it contains the same number of
B. neutrons and electrons
C. neutrons and positrons
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The force between two charges placed a given distance apart ______ as the relative permittivity of the medium is increased.
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The dielectric constant of most materials lies between
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The quantity 10^6 maxwells is equivalent to one
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Which of the following is used by temporary magnets as the magnetic material?
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The electric potential across part AB of a circuit is 5 V; point A being at higher potential. If a charge of 5 Cmoves from A to Ba then energy released as
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Temporary magnets are commonly employed in
C. moving coils loudspeakers
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The temperature coefficient of resistance of insulators is
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The core of a transformer heats up when its primary is fed from an ac source because of
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One coulomb of charge consists of ________ electrons.
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Electric potential is a _______ quantity.
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Who discovereda the relationship between magnetism and electricity that serves as the foundation for the theory of electromagnetism?
B. Hans Christian Oersted
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Amorphous solid is also called