Question

please solve this immediately ... 'cause I need it for upcoming exams ​

Answer 1

Answer:

From the more practical form of the Ohm's law we know that V = I R, i.e., potential difference across a conductor is the product of the current through that conductor and the resistance of that conductor. ... Putting all those relations in the equation, V = I R we get the vector form of Ohm's law, j = σ E.