Electric Potential on the surface of a charged spherical shell of radius shell of radius 10 cm is 50 volt. Find the value of electric potential at a distance of 20 cm from the centre of spherical shell.

Potential at surface= 50 V V = K . Q R 50 = K . Q 0 . 1 K . Q = 5 Where, V= electric potential Q= charge k=constant Potential at 200 m from centre V = K . Q R V = 5 0 . 2 V = 25 v o l t s

Write the name of physical quantity whose unit is J C . State whether this quantity is a vector or scalar?

The physical quantity whose S.I. units is J/C is electric potential. It is a scalar quantity .Electric potential is the scalar quantity because it is defined as the amount of work done to bring a unit positive charge to bring from infinity to the point under the influence of the primary charge.

Three charges of 1 nC , 2 nC and 3 nC are placed at the corners of an equilateral triangle of side 3 . Calculate electrostatic potential at a point equidistant from the three corners of the triangle.

l 1 = l 2 sec 30 ° = l 3 ⇒ V 0 = kq 1 l 1 + kq 2 l 1 + kq 3 l 1 = k l 1 ( q 1 + q 2 + q 3 ) = 3 k l q 1 + q 2 + q 3

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An uncharged conducting sphere is placed near to a charge $+ q$ as shown in the figure. The distance between charge $+ q$ and the sphere is d. Find the magnitude of the electric field produced by induced charge at the centre of the sphere.

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An uncharged conducting sphere is placed near to a charge +q as shown in the figure. The distance between charge +q and the sphere is d. Find the magnitude of the electric field produced by induced charge at the centre of the sphere.

Important Questions on Electrostatics

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An uncharged conducting sphere is placed near to a charge $+ q$ as shown in the figure. The distance between charge $+ q$ and the sphere is d. Find the magnitude of the electric field produced by induced charge at the centre of the sphere.