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Electronics - Alternating Current vs Direct Current

Exercise : Alternating Current vs Direct Current - General Questions
31.
What is the name of a device that converts sound waves to electrical waves?
an amplifier
an antenna
a filter
a microphone
Answer: Option
Explanation:
No answer description is available. Let's discuss.
32.
If the frequency of a radio wave is increased, then its wavelength will:
increase
decrease
remain the same
cannot tell
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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)
5.3 V
10.6 V
15.0 V
21.2 V
Answer: Option
Explanation:
No answer description is available. Let's discuss.
34.
What is the peak-to-peak current value when an ammeter measures a 20 mA value?
14 mA
28 mA
40 mA
57 mA
Answer: Option
Explanation:
No answer description is available. Let's discuss.
35.
How long would it take to transmit an electromagnetic wave to a receiving antenna 1,000 miles away?
5.38 ms
10.8 ms
53.8 ms
108 ms
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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