Multiple choice

__________ and ________ are n-type of semiconductors.

  1. Boron, germanium

  2. Silicon, germanium

  3. Alluminium, gallium

  4. Magnesium, lithium

  5. Cobalt, nickel

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

 it is correct. Silicon and/or germanium are doped with electron rich impurities to increase their electrical conductivity. Semiconductors so formed are called n-type semiconductors.