Electronics - Alternating Current vs Direct Current
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Exercise"Actions speak louder than words."
- (Proverb)
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| 31. |
What is the name of a device that converts sound waves to electrical waves? |
| A. |
an amplifier | | B. |
an antenna | | C. |
a filter | | D. |
a microphone |
Answer: Option A
Explanation:
No answer description available for this question. Let us discuss.
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| 32. |
If the frequency of a radio wave is increased, then its wavelength will: |
| A. |
increase | | B. |
decrease | | C. |
remain the same | | D. |
cannot tell |
Answer: Option A
Explanation:
No answer description available for this question. Let us discuss.
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| 33. |
What is the rms voltage value of an ac signal whose peak oscilloscope display uses 3 major divisions above the zero setting? (V/cm = 5) |
Answer: Option D
Explanation:
No answer description available for this question. Let us discuss.
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| 34. |
What is the peak-to-peak current value when an ammeter measures a 20 mA value? |
Answer: Option A
Explanation:
No answer description available for this question. Let us discuss.
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| 35. |
How long would it take to transmit an electromagnetic wave to a receiving antenna 1,000 miles away? |
Answer: Option A
Explanation:
No answer description available for this question. Let us discuss.
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