J = `sigma` E represents ........ .

Options

A. Coulomb's law
B. Ampere's law
C. Ohm's law
D. Gauss's law

Answer

C

Explanation

Ohm.s law
J = `sigma` E
`therefore (I)/(A) = (N)/(C) xx (1)/(Rm) [ "Unit of " sigma = (1)/(Omega m) , " Unit of " `
`E = (N)/(C) and " Unit of " J = (A)/(m^(2)) ]`
`therefore (I)/(m^(2)) = (N)/(CRm)`
`therefore I = (NM)/(CR) = (V)/(R) . ` Which is Ohm.s law.
`" " [ because (Nm)/(C) = " voltage" ] `