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Oscillators - Questions and Answers

Practice questions on Oscillators.

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11. The frequency range of audio signal is from
A. 20 Hz to 2000 Hz
B. 20 kHz to 20 MHz
C. 20 Hz to 20 kHz
D. 20 Hz to 20000 kHz
Explanation:
12. A feedback amplifier becomes an oscillator when
A. 1 – βA < 1
B. 1 – βA = 0
C. 1 – βA > 1
D. A’ = A/1 – βA
Explanation:
13. In radio broadcasting, an antenna is used for
A. demodulation
B. transmission
C. detection
D. modulation
Explanation:
14. An electronic oscillator is a device which produces
A. modulated carrier waves
B. light waves
C. signal waves
D. carrier waves
Explanation:
15. The frequency of a transistor Hartley oscillator with L1 = 100 µH; L2 = 1 mH and C= 20 pF is
A. 1000 Hz
B. 1050 Hz
C. 1000 kHz
D. 500 kHz
Explanation:
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