Forward Bias — DiodeEasyQuestion 20218
Question
Forward biasing a p-n junction means:
- AConnecting p to negative terminal and n to positive terminal
- BConnecting p to positive terminal and n to negative terminalCorrect
- CIncreasing reverse voltage
- DAdding more impurities
Correct answer
Connecting p to positive terminal and n to negative terminal
Explanation
Forward bias: p-side to +V, n-side to 0V. Applied field opposes the built-in field → depletion width decreases → barrier lowers → majority carriers flow across → large current. Threshold: ~0.3 V for Ge, ~0.7 V for Si.