The emitter of a transistor is ___________ doped

The correct answer is: B. heavily doped

The emitter of a transistor is heavily doped with impurities to create a large number of free charge carriers. This is necessary to ensure that the transistor can operate efficiently.

The other options are incorrect because they do not accurately describe the doping of the emitter of a transistor.

• Lightly doped: This would not create enough free charge carriers to allow the transistor to operate efficiently.
• Moderately doped: This would not be as effective as heavily doped in creating a large number of free charge carriers.
• None of the above: This is not an accurate description of the doping of the emitter of a transistor.