Thank you for registering.

One of our academic counsellors will contact you within 1 working day.

Please check your email for login details.

Use Coupon: CART20 and get 20% off on all online Study Material

Total Price: Rs.

There are no items in this cart.
Continue Shopping

Derived and explain microscopic models of resistance

Derived and explain microscopic models of resistance 

Grade:12th pass

1 Answers

25763 Points
one year ago


The microscopic form of Ohm's law is J =σ E, where σ is the electrical conductivity, E the electric field and J the current density .
This form of Ohm's law operates on a microscopic level relating the current density J to the conductivity σ and the electric field E.
We know that the current I = A nevd 
             where A is the area of cross-section ,n the number density of electrons, e the charge on each electron and vd the drift velocity of electrons.
Current density J at a point in a conductor is the amount of current flowing per unit area of the conductor around that point provided the area is held in a direction normal to the current

Think You Can Provide A Better Answer ?

Provide a better Answer & Earn Cool Goodies See our forum point policy


Get your questions answered by the expert for free