If the electric potential at a distance of 10 cm from a point charge is -2 volt, intensity of electric field at that point is

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20 V/m directed away from the charge

200 V/m directed towards the charge

20 V/m directed towards the charge

200 V/m directed away from the charge

answer is C.

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Detailed Solution

For a point charge, V=14π∈o.Qrand E=14π∈o.Qr2∴E→=Vr=20.1V/m=20 V/mSince the potential is negative, the charge must be negative and hence the field is directed towards the charge.

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