What does “Forward & reverse bias” actually mean in Semiconductor Electronics (Diodes), and why does it matter for JEE?
forward bias (p to +, n to −) lowers the junction barrier and lets current flow; reverse bias widens the depletion region and blocks it.
In simple words: forward bias (p to +, n to −) lowers the junction barrier and lets current flow; reverse bias widens the depletion region and blocks it. Getting Forward & reverse bias clear matters because JEE questions on Semiconductor Electronics (Diodes) usually test this idea directly, not just a formula you memorised.
Key point
Forward & reverse bias
Common mistake
thinking a diode conducts equally both ways.
Memory tip
a diode is a one-way valve for current — forward on, reverse off.
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