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Semiconductor Electronic: Material, Devices And Simple Circuits — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsSemiconductor Electronic: Material, Devices And Simple Circuits1 Mark
MCQ
In an intrinsic semiconductor, conductivity is:
  • A
    Low at room temperature
  • B
    Average
  • C
    High at room temperature
  • D
    Zero at room temperature
✓

Answer

  1. Low at room temperature

Explanation:

In intrinsic semiconductors, n = p. Hence, at room temperature, no free electrons are available for conduction. If the temperature is increased, the covalent bonds will break and electrons will be freed, each electron will leave behind a hole and capture a new hole the process will continued and charge flows through intrinsic semiconductor.

Thus, its conductivity increases with temperature. Hence, in intrinsic semiconductor conductivity is low at room temperature.

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