Teach Yourself Electricity and Electronics, 6th Edition (Teach Yourself (McGraw-Hill)) by Gibilisco Stan & Gibilisco Stan & Monk Simon & Monk Simon

Author:Gibilisco, Stan & Gibilisco, Stan & Monk, Simon & Monk, Simon [Gibilisco, Stan]
Language: eng
Format: epub, pdf
Publisher: McGraw-Hill Education
Published: 2016-06-21T16:00:00+00:00

21-13 Illustration for Quiz Questions 17 through 20 .

(a) The power supply voltage is too high for any bipolar transistor to handle.

(b) We should use an NPN transistor, not a PNP transistor.

(c) The power-supply polarity at the collector should be positive, not negative.

(d) We should transpose the input and output terminals.

18 . In the circuit of Fig. 21-13 , what purpose does component X serve?

(a) It keeps the signal from “shorting out” through the emitter.

(b) It helps to establish the proper bias at the collector.

(c) It keeps the signal from “feeding back” into the input device.

(d) It blocks DC to or from the external input device, while letting the AC signal pass.

19 . In the circuit of Fig. 21-13 , what purpose does component Y serve?

(a) It keeps the input isolated from the output.

(b) It keeps the input signal from “shorting out” through the power supply.

(c) It keeps the emitter at signal ground, while allowing a DC voltage to exist there.

(d) It helps to establish the proper bias at the base.

20 . In the circuit of Fig. 21-13 , what purpose does component Z serve?

(a) It keeps the circuit from breaking into oscillation.

(b) It blocks DC to or from the external output device while letting the AC signal pass.

(c) It matches the transistor’s impedance to the impedance of the external output device, or load.

(d) It ensures that the output wave remains in phase with the input wave.

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