Forward biasing a solid state device will cause it to:

Forward biasing a solid state device will cause it to:

• A. Block current
• B. Conduct
• C. Oscillate
• D. Fail

Answer: (B)

Forward biasing lowers the barrier at a PN junction, letting charge carriers cross more easily. When the p-type side is made more positive relative to the n-type side, holes are pushed toward the junction and electrons toward it, narrowing and weakening the depletion region. This makes it energetically favorable for carriers to cross, so current flows and the device conducts. The other ideas don’t fit: reverse bias widens the depletion region and blocks current; oscillation requires specific circuit conditions beyond simple forward bias; and forward bias isn’t an automatic cause of failure—it simply enables conduction within the device’s ratings.

Forward biasing lowers the barrier at a PN junction, letting charge carriers cross more easily. When the p-type side is made more positive relative to the n-type side, holes are pushed toward the junction and electrons toward it, narrowing and weakening the depletion region. This makes it energetically favorable for carriers to cross, so current flows and the device conducts. The other ideas don’t fit: reverse bias widens the depletion region and blocks current; oscillation requires specific circuit conditions beyond simple forward bias; and forward bias isn’t an automatic cause of failure—it simply enables conduction within the device’s ratings.