Thank you for registering.

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

Please check your email for login details.
MY CART (5)

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

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: Rs.

There are no items in this cart.
Continue Shopping

In terms of band theory, what is the difference (i) between a conductor and an insulator (ii) between a conductor and a semiconductor?

In terms of band theory, what is the difference (i) between a conductor and an insulator (ii) between a conductor and a semiconductor?

Grade:8

1 Answers

Suraj Prasad IIT Patna
askIITians Faculty 286 Points
7 years ago

(i)
A conductor may conduct electricity due to movement of electrons or ions. If valance band is partially filled or it overlaps with a higher energy unoccupied conduction band, then electrons can flow easily flow under an applied electric field and the metal shows conductivity.
If the gap between filled valence band and the next higher unoccupied band (conduction band) is large, electrons cannot jump to it and such a substance has very small conductivity and it behaves as an insulator .n a conductor and an insulator
(ii)

A conductor may conduct electricity due to movement of electrons or ions. If valance band is partially filled or it overlaps with a higher energy unoccupied conduction band, then electrons can flow easily flow under an applied electric field and the metal shows conductivity.
In case of semiconductors, the gap between the valence band and conduction band is small. Therefore, some electrons may jump to conduction band and show some conductivity. Electrical conductivity of semi conductors increases with rise in temperature because with the rise of temperature more electrons can jump to the conduction band. Substances like silicon and germanium show this type of behaviour and are called semiconductors.

Think You Can Provide A Better Answer ?

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

ASK QUESTION

Get your questions answered by the expert for free