Question

For transistor action, which of the following statements is correct?

• A. The collector side is heavily doped and has small cross-sectional area.
• B. Transistor works as an amplifier when both emitter-base and collector-base junction is reverse biased.
• C. In p-n-p transistor, current enters from emitter into base region.
• D. Base current is approximately equal to collector current in a n-p-n transistor.

Answer 1

The correct option is C In p-n-p transistor, current enters from emitter into base region.

In bipolar junction transistor collector is moderately doped. In p-n-p transistor, current enters from emitter into base region.

For transistor to work as an amplifier, emitter-base junction should in forward biased mode while collector base junction should be in reversed biased mode.