• Assertion (A): Putting the p-type semiconductor slab directly in physical contact with the n-type semiconductor slab cannot form the pn junction. • Reason (R): The roughness at contact will be much more than inter atomic crystal spacing and continuous flow of charge carriers is not possible.

Question

KollegeApply · Accepted Answer

If both Assertion and Reason are true and Reason is the correct explanation of Assertion. Explanation: A pn junction cannot be formed by physically contacting a p-type semiconductor slab with an n-type semiconductor slab. The roughness upon contact does not match the inter-atomic crystal spacing of about 2-3 Å, resulting in a discontinuity. As a result, a continuous flow of charge carriers is impossible. So both the statement and the reason are correct, and the reason explains the assertion.

AChoose Your Answer