The barrier potential accross each depletion layer is A. 0 B. 0.8 V C. 0.7 V D. 20 V E. None of the above

Option A is incorrect because the barrier potential is not equal to zero.

Option B is incorrect because the barrier potential is not equal to 0.8 volts.

Option C is correct because the barrier potential is typically in the range of 0.5 to 0.7 volts.

Option D is incorrect because the barrier potential is not equal to 20 volts.

Option E is incorrect because the barrier potential is not equal to none of the above.