Entry Test MCQ :: Electronics
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| 11. |
The velocity of an oscillating charge as it moves to and fro along a wire is always |
| A. |
constant |
B. |
zero |
| C. |
changing |
D. |
infinite |
Answer: Option C
Explanation:
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| 12. |
Which one of following band is completely filled in case of conductors? |
| A. |
Conduction band |
B. |
Fermi band |
| C. |
Valence band |
D. |
Forbidden band |
Answer: Option A
Explanation:
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| 13. |
Which one of the following has the greatest energy gap? |
| A. |
insulator |
B. |
conductor |
| C. |
semi conductor |
D. |
any of above |
Answer: Option A
Explanation:
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| 14. |
The value of resistivity for insulator is of the order of |
| A. |
105 ohm metre |
B. |
106 ohm metre |
| C. |
107 ohm metre |
D. |
108 ohm metre |
Answer: Option D
Explanation:
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| 15. |
Thermions are |
| A. |
protons |
B. |
positrons |
| C. |
electrons |
D. |
photons |
Answer: Option C
Explanation:
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| 16. |
Hole is equivalent to |
| A. |
a negative charge |
B. |
a positive charge |
| C. |
a neutral particle |
D. |
an electron |
Answer: Option B
Explanation:
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| 17. |
Which one of the following is not a donor impurity? |
| A. |
antimony |
B. |
phosphorus |
| C. |
aluminium |
D. |
arsenic |
Answer: Option C
Explanation:
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| 18. |
Forward current through a semi conductor diode circuit is due to |
| A. |
minority carriers |
B. |
majority carriers |
| C. |
holes |
D. |
electrons |
Answer: Option B
Explanation:
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| 19. |
In the transistor schematic symbol, the arrow |
| A. |
is located on the emitter |
B. |
is located on the base |
| C. |
is locate on the collector |
D. |
points form north to south |
Answer: Option A
Explanation:
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| 20. |
The symbol of n-p-n transistor is |
Answer: Option D
Explanation:
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