•Suppose an electron is confined in an infinite potential well as shown in figure. Find out its eigenenergies and resulting wavefunction.
En (x)=j
DICELCTRIC MATERIAL AND
INSULATOR
CHAPTER 7
FOURTH EDITION S.O.KASAP
The familiar parallel plate
Capacitor Equation :
DICELCTRIC MATERIAL AND INSULATOR
CHAPTER 7
FOURTH EDITION S.O.KASAP
• A – Area of the capacitor plate
• d – distance between the plate
What happens when we put a material medium between the plates ?
•a. Increase charge storage ability
•b. Decrease charge storage ability
•c. Increase dielectric constant
•d. Decrease dielectric constant
•During the insertion of dielectric slab, there is an external current flow that indicates
that ther is additional charge being stored on the plates. The charge on the electrodes increases from Qo and Q. We can easily
measure the extra charge Q-Q0 flowing from the battery to the plates by integrating the observed current in the circuit during the process of insertion.
•If there is a material medium between the plates , then the capacitance , the charge storage ability per unit voltage , increases by a factor of called as relative permittivity.
What is the net charge
of capacitor?
ZeroInfinite
+Q
-Q
Depends on stored charge on the plate.
What kind of
purposes is a
capacitor used ?
What kind of purposes is a capacitor used ?
Store Electrical Energy
Block Dc input and pass Ac output Filter
Power factor improvement
•7.1.2 Dipole moment and Electronic Polarization
•Page No 661 Kasap fourth edition
