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What is the difference among Free Electron Theory and Band Theory of solids?
Free Electron Theory:
This theory says that, metals conduct electricity due to the presence of free electrons in it. The outermost shells of metal atoms will be loosely bound with their nucleus. So the electrons in it are free to move anywhere in the solid.
These electrons are known as free electrons and these electrons are responsible for the conduction of electricity.
Production of electricity by heat: The Seebeck effect - the thermocouple . When two different metals are brought into contact with one another, it is found that electrons can
Q. An object of size 3.0 cm is placed 14cm in front of a concave lens of focal length 21 cm. Describe the image produced by the lens. What happens if the object is moved further aw
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Two charges eachof q=+2 micro coloumb are placed at the vertices Q and R of the triangle .the sum of sides PQ and PR is 12cm and their product is 32 cm_2 .the potential at point P
Conductor: Conductors are those substances which permit electric current to passes easily by them. e.g. Metal, impure, water etc.
show that in a glass prism that the refractive index n = sin1/2(A+Dmin)/sin1/2A where a = refracting angle. hence if the angle of incidence i on oan air boundary is 60degrees. calc
Casting : Fe-C alloys with more than 2% carbon are known as cast irons. On crossing the liquidus, proeutectic crystallizes first. On passing by the eutectic temperatures, the liqui
What are capacitors used for in induction coils
a) How much charge should be placed on it to raise its potential to 10,000 V. b) A parallel plate capacitor having plate area 100 cm 2 and separation 1.0 mm holds a charge of
A 150-kg roller-coaster car climbs to the top of a 91-m-high hill. How much work is completed against gravity as the car is lifted to the top of the hill?
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