P-N Junctions

  • #1

Homework Statement



An LED is connected as shown (see attached)

When switch S is closed:
A. the p-n junction is reverse biased and free charge carriers are produced which may recombine to give quanta of radiation.
B. the p-n junction is forward biased and positive and negative charge carriers are produced by the action of light.
C. the p-n junction is reverse biased and positive and negative charge carriers are produced by the action of light.
D. the p-n junction is forward biased and positive and negative charge carriers may recombine to give quanta of radiation
E. the p-n junction is reverse biased and positive and negative charge carriers may recombine to give quanta of radiation.

Homework Equations



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The Attempt at a Solution



Question came up on the multiple choice section in an exam, took a guess at E but was looking for a hint?

Thanks in advance,
 

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