Entry Test MCQ :: Electronics
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1. |
Electrons present in p-type material due to thermal pair generation are |
A. |
majority carriers |
B. |
minority carriers |
C. |
dual carriers |
D. |
blockers |
Answer: Option B
Explanation:
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2. |
Semi-conductors with donor atoms and free electrons belong to the type |
Answer: Option A
Explanation:
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3. |
Semi-conductor germanium and silicon are |
A. |
pentavalent |
B. |
trivalent |
C. |
divalent |
D. |
tetravalent |
Answer: Option D
Explanation:
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4. |
Acceptor and donor impurities donate |
A. |
n-carriers only |
B. |
p-carriers only |
C. |
p-carriers and n-carriers respectively |
D. |
n-carriers and p-carriers respectively |
Answer: Option C
Explanation:
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5. |
p-n junction when reversed biased acts as a |
A. |
capacitor |
B. |
inductor |
C. |
on switch |
D. |
off switch |
Answer: Option D
Explanation:
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6. |
In p-n-p transistor the collector current is |
A. |
equal to emitter current |
B. |
slightly less than emitter current |
C. |
greater than emitter current |
D. |
any of above |
Answer: Option B
Explanation:
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7. |
In n-p-n transistor, p works as |
A. |
collector |
B. |
emitter |
C. |
base |
D. |
any of above |
Answer: Option C
Explanation:
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8. |
The simplest type of rectification known as half wave rectification is obtained by |
A. |
using a transistor |
B. |
suppressing the harmonics in A.C voltage |
C. |
suppressing half wave of A.C supply by using diode |
D. |
using a Coolidge tube |
Answer: Option C
Explanation:
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9. |
Identify the correct statement about minority carriers |
A. |
holes in n-type and free electrons in p-type |
B. |
holes in n-type and p-type |
C. |
free electrons in n-type and holes in p-type |
D. |
free electrons in n-type and p-type |
Answer: Option A
Explanation:
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10. |
Depletion region of a junction is formed |
A. |
during the manufacturing process |
B. |
under forward bias |
C. |
under reverse bias |
D. |
when temperature varies |
Answer: Option A
Explanation:
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