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physics

zahra tanvir

when a pn junction is forwardbiased it behaves as
short circuit
p type
n type
open circuit
which one is right

Reply 1

zahra tanvir

Original post by zahra tanvir

when a pn junction is forwardbiased it behaves as
short circuit
p type
n type
open circuit
which one is right

Reply 2

m005eman

try putting this in the physics forum, you'll be more likely to get a response

Reply 3

uberteknik

Original post by zahra tanvir

when a pn junction is forwardbiased it behaves as
short circuit
p type
n type
open circuit
which one is right

Look at the diode characteristic curves.

With the junction forward biased and as long as the threshold voltage is exceeded, it will behave as an approximate short circuit. i.e. current is unlimited.

In practice, there is a small resistance across the junction, which is the reason why diodes must have a series current limiting resistor in circuit - to avoid destruction of the diode through excessive power dissipation.