Electronics and Communication Engineering - Electronic Devices and Circuits
Exercise :: Electronic Devices and Circuits - Section 15
| 1. |
The product kT (where k is Boltzmann's constant and T is absolute temperature) at room temperature is about |
| A. |
0.051 eV | | B. |
0.026 eV | | C. |
0.01 eV | | D. |
0.001 eV |
Answer: Option B
Explanation:
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| 2. |
If E is energy level of electron and EF is fermi level, and T = 0 and E > EF, then |
| A. |
the probability of finding an occupied quantum state of energy higher than EF is zero | | B. |
all quantum states with energies greater than EF are occupied | | C. |
some quantum states with energies greater than EF are occupied | | D. |
majority of quantum states with energies greater than EF are occupied |
Answer: Option A
Explanation:
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| 3. |
Which variety of copper has the best conductivity? |
| A. |
Pure annealed copper | | B. |
Hard drawn copper | | C. |
Induction hardened copper | | D. |
Copper containing traces of silicon |
Answer: Option A
Explanation:
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| 4. |
The number of valence electrons in a silicon atom is |
Answer: Option A
Explanation:
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| 5. |
In a JFET VDS exceeds the rated value. Then it operates in |
| A. |
active region | | B. |
ohmic region | | C. |
cut off region | | D. |
either cut off or active region |
Answer: Option C
Explanation:
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