The collector of a transistor is ___________ doped

heavily
moderately
lightly
none of the above

The correct answer is: A. heavily doped.

The collector of a transistor is heavily doped with impurities to increase the number of free electrons available for conduction. This allows the collector to carry a large current when a small current is applied to the base.

The other options are incorrect because they do not describe the doping of the collector accurately.

  • Option B: moderately doped. The collector is not moderately doped, it is heavily doped.
  • Option C: lightly doped. The collector is not lightly doped, it is heavily doped.
  • Option D: none of the above. This option is incorrect because it does not describe the doping of the collector accurately.

I hope this helps! Let me know if you have any other questions.