[" 1) "200Nm^(2)c^(-1)quad " 2) "400Nm^(2)c^(-1)quad " 3) "600Nm^(2)c^(-1)quad " 4) "800Nm^(2)c^(-1)],[" A rod with linear charge density "lambda" is bent in the shape of circular ring.The electric potential at the "],[" centre of the circular ring is "]

A rod with linear charge density lambda is bent in the shap of circular ring. The electric potential at the centre of the circular ring is

Two semicircular rings lying in same plane, of uniform linear charge density lambda have radius r and 2r. They are joined using two straight uniformly charged wires of linear charge density lambda and length r as shown in figure. The magnitude of electric field at common centre of semi circular rings is -

Two semicircular rings lying in same plane, of uniform linear charge density lambda have radius r and 2r. They are joined using two straight uniformly charged wires of linear charge density lambda and length r as shown in figure. The magnitude of electric field at common centre of semi circular rings is -

Two semicircular rings lying in same plane, of uniform linear charge density lambda have radius r and 2r. They are joined using two straight uniformly charged wires of linear charge density lambda and length r as shown in figure. The magnitude of electric field at common centre of semi circular rings is -

The unit of electric permittivity is (C^(2))/(Nm^(2)) . Find the dimesions of electric permittivity

The unit of electric permittivity is (C^(2))/(Nm^(2)) . Find the dimesions of electric permittivity

An electric flux of 100 frac(Nm^2)(c) comes out of a sphere. Find the positive charge inside the sphere.

What is the magnitude of a point charge due to which the electric field 30cm away the magnitude 2 ? [1//4 pi epsilon_(0)=9xx10^(9)Nm^(2)//C^(2)]

What is the magnitude of a point charge due to which the electric field 30cm away the magnitude 2 ? [1//4 pi epsilon_(0)=9xx10^(9)Nm^(2)//C^(2)]