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BITSAT 2023Paper 1
Exam
BITSAT
Year
2023
Paper
Paper 1
Subject
Physics
Chapter
Semiconductors

BITSAT 2023 · Paper 1 · Physics · Semiconductors

The effect of increase in temperature on the number of electrons in...

The effect of increase in temperature on the number of electrons in conduction band (ne)\left(\mathrm{n}_{\mathrm{e}}\right) and resistance of a semiconductor will be as:

Options

  1. ABoth ne\mathrm{n}_{\mathrm{e}} and resistance decrease
  2. BBoth ne\mathrm{n}_{\mathrm{e}} and resistance increase
  3. Cne\mathrm{n}_{\mathrm{e}} increases, resistance decreases
  4. Dnen_e decreases, resistance increases

Correct answer

C. ne\mathrm{n}_{\mathrm{e}} increases, resistance decreases

Step-by-step solution

When temperature increases, more electrons excite to conduction band and hence conductivity increases, therefore resistance decreases.
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