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EVALUATION TEST ON ELECTROSTATICS
1
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2
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Locate the points where the potential due to the dipole is zero
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Express dielectric constant of a medium in terms of capacitance
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The two plates of a parallel plate capacitor are 4mm apart
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The distance
between the plates is also adjusted that the capacitance of the capacitor becomes 2/3 rd of its
original value
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Three point charges of +2µC, -3µC and -3µC are kept at the vertices A, B and C respectively
of an equilateral, triangle of side 20cm
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A parallel plate capacitor is charged by a battery which is then disconnected
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Explain what changes if any occur in the value of
i) Capacitance
ii) Potential Difference between the plates
iii) Electric field between the plates
iv) Energy stored in the capacitor
v) Charge on the plates
7
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When the battery remains connected, a
dielectric slab is then inserted in the space between the plates
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Calculate the work done to dissociate the system of three charges placed on the vertices of a
triangle of side 10cm