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Blazing goIITian

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5 Feb 2012 20:54:24 IST

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Electric Intensity

Physics

Find the electricity field intensity at any point due to point charge in terms of position vector .

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Arjun Virmani

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Joined: 1 Jun 2009

Posts: 1294

6 Feb 2012 23:25:15 IST

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Electricity field intensity is a vector with the direction outwards for a +ve charge and inwards for a -ve charge and magnitude :

E = k * q / r².

where,

k = constant of proportionality ( approx. used for cal. 9 * 10⁹ Nm²c-2 for air)

q = charge of the point charge

r = distance or magnitude of the position vector with the point charge at origin.

The direction of E is same as that of position vector in case of +ve charge and opposite of postion vector in case of -ve charge.

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