Question:
In an NPN transistor, the region which is heavily doped is
In an NPN transistor, the region which is heavily doped is
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In a transistor, emitter is heavily doped, base is lightly doped, and collector is moderately doped.
Updated On: May 27, 2026
- Collector
- Base
- Emitter
- Substrate
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The Correct Option is C
Solution and Explanation
Concept:
A transistor has three regions: emitter, base, and collector. These regions have different doping levels.
Step 1: The emitter supplies majority charge carriers.
Step 2: To inject a large number of carriers into the base, the emitter is heavily doped.
Step 3: The base is very thin and lightly doped.
Step 4: The collector is moderately doped and physically larger because it collects carriers and dissipates heat. Therefore, the heavily doped region is: \[ \boxed{\text{Emitter}} \]
Step 1: The emitter supplies majority charge carriers.
Step 2: To inject a large number of carriers into the base, the emitter is heavily doped.
Step 3: The base is very thin and lightly doped.
Step 4: The collector is moderately doped and physically larger because it collects carriers and dissipates heat. Therefore, the heavily doped region is: \[ \boxed{\text{Emitter}} \]
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