Garantie de satisfaction à 100% Disponible immédiatement après paiement En ligne et en PDF Tu n'es attaché à rien
Recherché précédemment par vous
Summary physics guru,physics for bsc,2nd year physics,physics,ipe exams physics,1st year physics,physics by rama mam,mphw 2nd yr,telugu physics,2nd year physics last minute preparation,how to get 60/60 in physics 2nd year 2024,ipe exam strategy for physics,telugu$9.49
Ajouter au panier
Summary physics guru,physics for bsc,2nd year physics,physics,ipe exams physics,1st year physics,physics by rama mam,mphw 2nd yr,telugu physics,2nd year physics last minute preparation,how to get 60/60 in physics 2nd year 2024,ipe exam strategy for physics,telugu
5 vues 0 fois vendu
Cours
7795 (7795)
Établissement
BELAGAVI UNIVERSITY
Certainly! A second-year physics course usually delves into more advanced topics than what is covered in the first year, focusing on building a deeper understanding of physical principles and their applications. Here's a general description of what you might encounter in a second-year physics curri...
PHYSICS – 2024
Semiconductor Electronics
MANU G.A. (9742835053)
On the basis of energy bands distinguish between a conductors (metals),
semiconductor and an insulator.
CONDUCTORS SEMICONDUCTORS INSULATORS
It has low resistivity It has moderate resistivity It has high resistivity
They allow current to pass Their electrical properties They don‟t allow current
through it lies between that of to pass through it
conductors and
insulators
conductivity decreases conductivity increases Their conductivity is zero
with increase in with increase in
temperature temperature
Conductivity is due to free Conductivity is due to No electrons or
electrons both electrons and holes for
holes conductivity.
Conduction band is Conduction band is Conduction band is
completely filled with partially filled with completely empty
electrons at above 0K electrons above 0K
Distinction between Intrinsic and Extrinsic semiconductor
Intrinsic semiconductor Extrinsic semiconductor
1 These are pure semiconductor 1 These are doped semiconductors
2 Conductivity is due both electrons 2 Conductivity is mainly due to
and holes. majority charge carriers.
3 Conductivity is low. 3 Conductivity is high.
4 = 4
5 Conductivity depends on the 5 Conductivity depends on the
temperature. temperature and also doping
level.
,Distinguish between p – type and n – type semiconductors.
p – type semiconductor n – type semiconductor
1 Trivalent dopants are used 1 Pentavalent dopants are used
2 It has acceptor impurity 2 It has donor impurity
3 The majority charge carriers are holes
3 The majority charge carriers are
electrons
4 The minority charge carriers are 4 The minority charge carriers are
electrons holes
5 Acceptor energy level is slightly 5 Donar energy level is slightly below
above the top of the valence band. the bottom of the conduction
band .
6 >>> 6 >>>
Forward biasing of diode : -
The diode is said to be forward biased when p –side is connected to +ve
terminal and n – side is connected to –ve terminal of the battery.
During forward bias
The width of depletion region decreases and
Junction potential decreases
The charge carriers cross the junction and electric current flows through the circuit.
Forward bias offers negligibly small resistance and hence the diode conducts.
Current is due to majority charge carriers.
Reverse biasing of diode : -
The diode is said to be forward biased when p –side is connected to –ve terminal and
n – side is connected to +ve terminal of the battery.
During reverse bias
The width of depletion region increases
Junction potential increases
Reverse bias offers high resistance
Current is due to minority charge carriers.
, 1. Half wave rectifier: -
A device which converts AC to DC is called a rectifier and the process is called
rectification.
It is a device which converts only one half cycle of ac into dc.
During the positive half cycle of input AC voltage i.e. When „A‟ is +ve the diode
is forward biased and it conducts. As a result current flows through the R L and produces
output across it.
During negative half cycle of input A.C voltage i.e. when „A‟ is – ve the diode is
reverse biased so it does not conduct. So we can‟t get the output. The input and output
wave forms of half wave rectifier are as shown in figure.
2. Full wave rectifier: -
A device which converts AC to DC is called a rectifier and the process is called
rectification.
Full wave rectifier is a device which converts both the half cycles of ac into dc.
During the positive half cycle of input AC voltage, A is positive and B is negative the
diode D1 is forward biased so D1 conducts. The diode D2 is in reverse biased and hence
D2 does not conduct. As a result the current I flows through R L and produces output
across the RL.
During the negative half cycle of input AC voltage, A is negative and B is positive the
diode D1 is reverse biased so D1 does not conducts. The diode D2 is in forward biased
and hence D2 conducts. As a result the current I flows through RL and produces output
across the RL.
Les avantages d'acheter des résumés chez Stuvia:
Qualité garantie par les avis des clients
Les clients de Stuvia ont évalués plus de 700 000 résumés. C'est comme ça que vous savez que vous achetez les meilleurs documents.
L’achat facile et rapide
Vous pouvez payer rapidement avec iDeal, carte de crédit ou Stuvia-crédit pour les résumés. Il n'y a pas d'adhésion nécessaire.
Focus sur l’essentiel
Vos camarades écrivent eux-mêmes les notes d’étude, c’est pourquoi les documents sont toujours fiables et à jour. Cela garantit que vous arrivez rapidement au coeur du matériel.
Foire aux questions
Qu'est-ce que j'obtiens en achetant ce document ?
Vous obtenez un PDF, disponible immédiatement après votre achat. Le document acheté est accessible à tout moment, n'importe où et indéfiniment via votre profil.
Garantie de remboursement : comment ça marche ?
Notre garantie de satisfaction garantit que vous trouverez toujours un document d'étude qui vous convient. Vous remplissez un formulaire et notre équipe du service client s'occupe du reste.
Auprès de qui est-ce que j'achète ce résumé ?
Stuvia est une place de marché. Alors, vous n'achetez donc pas ce document chez nous, mais auprès du vendeur shreyasbagewadi. Stuvia facilite les paiements au vendeur.
Est-ce que j'aurai un abonnement?
Non, vous n'achetez ce résumé que pour $9.49. Vous n'êtes lié à rien après votre achat.
