Related Questions
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The evaporation of electrons from a heated surface is called
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A negatively charge body has
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An alloy of 40 percent iron and 60 percent nickel.
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If the value of 0 a conductor is 1/234 per oCa then the value of 18is
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A positively charged body has
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The space outside the magnet where its pole have a force of attraction or repulsion on a magnetic pole is called
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The emission of electrons from hot bodies is called
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The uncharged particles which have no effect on its atomic charge.
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An effect which is generally used in the gausameter to measure flux density.
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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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The energy stored in an electrostatic field or electromagnetic field is called
A. Electromagnetic energy
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__________ is a substance of whose molecules consist of the same kind of atom.
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Define as that pole which when placed in air from a similar and equal pole repels it with a force of newtons
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The magnetic materials should have a large hysteresis loss for one of the following applications.
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Ohm's law can be used only to a _____ circuit or component.
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A negative ion results when an atom gains an additional
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Electrons at the outer shell are called
C. Semiconductor electrons
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The electric potential at a point in air due to a charge is 21 V. If the air is replaced by a medium of relative permittivity of 3a then electric potential at that point will be
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When the relative permeability of a material is slightly less than 1a it is called _____ material.
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One weber of flux is equal to _______ magnetic lines of force.
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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 straight line passing through the two poles of magnet is called
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The magnetic flux of 2000 lines is how many Maxwells?
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One oersted (Oe) is equivalent to _____ Gb/cm.
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At/m is a unit of
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The physical motion resulting from the forces of magnetic fields is called
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Germanium atom has ______ protons and ______ electrons.
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States that the ratio of the thermal conductivity is proportional to the absolute temperature for all metals.
A. Wien's displacement law
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Defined as the number of lines per unit area through any substance in a plane at right angles to the lines of force
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Magnetic field intensity is a ________ quantity.