JEE Main · PhysicsHard
In an intrinsic semiconductor at room temperature, the number of free electrons is . If the semiconductor is doped with pentavalent impurity atoms at a concentration of , calculate the new hole concentration .
- A.
- B.
- C.
- D.
Show correct answer & step-by-step solution
Correct answer: A —
Solution
- The law of mass action states .
- Since , the electron concentration .
- The hole concentration is .
- Calculate the result: .
- Hence the answer is (A).
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