Electronics and Communication Engineering - Electronic Devices and Circuits
Exercise :: Electronic Devices and Circuits - Section 10
| 1. |
At a P-N junction, the potential barrier is due to the charges on either side of the junction, which consists of |
| A. |
fixed donor and acceptor ions | | B. |
majority carriers only | | C. |
minority carriers only | | D. |
both majority and minority carriers |
Answer: Option A
Explanation:
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| 2. |
In a vacuum triode μ = rpgm. |
Answer: Option A
Explanation:
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| 3. |
The material which has zero temperature coefficient of resistance is |
| A. |
manganin | | B. |
porcelain | | C. |
carbon | | D. |
aluminium |
Answer: Option A
Explanation:
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| 4. |
When the light falling on a photodiode increases, the reverse minority current |
| A. |
increases | | B. |
increases or decreases | | C. |
decreases | | D. |
remains the same |
Answer: Option A
Explanation:
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| 5. |
When a ferromagnetic substance is magnetised, small changes in dimensions occur. Such a phenomenon is known as |
| A. |
magnetic hystresis | | B. |
magnetic expansion | | C. |
magneto striction | | D. |
magneto calorisation |
Answer: Option C
Explanation:
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