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A parallel plate air capacitor of capacitance is connected to a cell of emf and then disconnected from it. A dielectric slab of dielectric constant , which can just fill the air gap of the capacitor, is now inserted in it. Which of the following is incorrect?
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Important Questions on Electrostatics
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The electric field in a certain region is acting radially outward and is given by . A charge contained in a sphere of radius centred at the origin of the field will be given by
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If potential(in ) in a region is expressed as , the electric field(in ) at point is
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A parallel plate air capacitor has capacity , distance of separation between plates is and potential difference is applied between the plates. The force of attraction between the plates of the capacitor is
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Two thin dielectric slabs of dielectric constants and are inserted between plates of a parallel plate capacitor, as shown in the figure. The variation of electric field ‘ ’ between the plates with distance ‘ ’ as measured from plate is correctly shown by:
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A conducting sphere of radius is given a charge The electric potential and the electric field at the center of the sphere respectively are:
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In a region the potential is represented by where is in volts and are in meters. The electric force experienced by a charge of coulombs situated at point is:
