Electrical Engineering Material (Electrical Engineering) - MCQs
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Q1. |
heat conduction in a semiconductor takes place |
- A. why the mobility of carriers
- B. due to energy gap between conduction band and valency band
- C. by the holes and thermal vibrations of atoms
- D. by the electrons and thermal vibrations of atoms
Q2. |
the principle of hall effect is made use of in the construction of which one of the following? |
- A. ammetre
- B. voltmetre
- C. gaussmetre
- D. galvanometer
Q3. |
for which one of the following materials, is the hall coefficient closest to zero? |
- A. metal
- B. insulator
- C. intrinsic semiconductor
- D. alloy
Q4. |
the hall effect voltage in intrinsic silicon |
- A. is positive
- B. is negative
- C. zero
- D. changes its sign based on application of magnetic field
Q5. |
the temperature coefficient of resistance of a doped semiconductor is |
- A. always positive
- B. always negative
- C. zero
- D. positive or negative depending on the level of doping
Q6. |
which of the following has the greatest mobility? |
- A. positive ion
- B. negative ion
- C. electron
- D. hole
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