15. In groups describe semiconductors of N-type and P-type. Start your description like this:

If we add a small amount of arsenic to silicon

If instead of arsenic, a group III element such as gallium is introduced into a silicon crystal

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Read the text again and select from the multiple choice the only solution to each problem. | Act as an interpreter. Translate the description of N-type and P-type- semiconductors given by your group mates from English into Russian.

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