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A test charge means a charge of
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If the value of 25 a conductor is 1/255 per oCa then the value of 20is
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The emf induced in a coil due to the changing current of another neighboring coil is called
C. Statically induced emf
D. Dynamically induced emf
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What is the other name for dielectric strength?
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The magnetic field of a magnetized iron bar when strongly heated
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One oersted (Oe) is equivalent to _____ Gb/cm.
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Which of the following has the least number of valence electrons?
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Formed when there exist distant electronic interactions between (opposite) charges present in the neighboring atoms or molecules.
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The straight line passing through the two poles of magnet is called
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If the solenoid is gripped by the right hand with the fingers pointing the direction of current flowa the outstretched thumb will then point the north pole. This is known as
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A germanium atom has an atomic weight of72. How many neutrons are there?
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Refers to the non- metallic materials that have the ferromagnetic properties of iron.
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Lenz's law is the consequence of the law of conservation of
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Materials that have very high permeabilities (hundreds and even thousands times of that of free space)
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Magnetic effects of the earth as a huge magnet with north and south poles.
D. Terrestrial ferromagnetism
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A magnetic circuit carries a flux iin the iron part and a fluxgin the air gap. What is the leakage coefficient?
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Which of the following is a diamagnetic material?
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Cobalt is an example of a ______ material.
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The ability of a material to conduct magnetic flux through it.
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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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Which of the following is used by temporary magnets as the magnetic material?
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Electric lines of force leave or enter the charge surface at an angle of
D. depending upon the angle of launch and entry
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A magnetic material losses its ferromagnetic properties at a point called
B. Inferred absolute temperature
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What determines the value of the temperature coefficient of resistance of a material?
D. nature and temperature
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Permeance is analogous to
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The B-H curve of ________ is not a straight line.
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Ohm's law can be used only to a _____ circuit or component.
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Materials whose permeabilities are slightly greater than that of free space
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If two similar charges 1 coulomb each are placed 1 m apart in aira then the force of repulsion is
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A factor used to correct for the electrostatic forces of the more distant ions in an ionic solid.