Find the resistivity of a conductor in which a current density `2.5 Am^(-2)` is found to exist when an electric field `15Vm^(-1)` is applied on it.

Find the slope of a line which passes through the points (3,2) and (-1,5)

Consider an infinitely long straight uniformly charged wire with linear charge density ? Br Apply Gauss.s theorem to find the electric field at P for the above mentioned charged wire. Write the direction of the field.

Current density j is flowing in a resistor of resistivity rho . We can thus recognise j^(2) rho as the

Figure represent an infinite sheet of charge of surface charge density sigma . You have to find electric field Intensity at P due to this infinite charge. br Can you apply Coulomb.s Inverse square law to find electric field at P?