The electric field at a point situated at a distance d from straight charged conductor is
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capacitors are used for audio frequency and radio frequency coupling and tuning.
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. . . . . . . . at a point may be defined as equal to the lines of force passing normally through a unit cross section at that point.
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When a dielectric is placed in an electric field the field strength
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The force between two charges is 120 N. If the distance between the charges is doubled, the force will be
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Which of the following materials has the highest value of dielectric constant?
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at a point is equal to the negative potential gradient at that point.
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The sparking between two electrical contacts can be reduced by inserting a
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The units of volume charge density are
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What will happen to an insulating medium if voltage more than the breakdown voltage is applied on it ?
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If three 15 uF capacitors are connected in series, the net capacitance is
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If three 10 uF capacitors are connected in parallel, the net cararitance is
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capacitors can be used only for D.C.
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Two plates of a parallel plate capacitor after being charged from a constant voltage source are separated apart by means of insulated handles, then the
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The presence of an uncharged conductor near a charged one increases the
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The absolute permittivity of free space is given by
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The relative permittivity of free space is given by
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Electric field intensity is a quantity
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The time constant of an R-C circuit is defined as the time during which capacitor charging voltage actually rises to . . . . . . . . percent of its . . . . . . . . value.
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The potential gradient across the material of low permittivity is than across the material of high permittivity.
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