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Exam (elaborations)

ECE 320: Electronic 1 Question & Answer

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2023/2024 Written for academic year
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Course Electronics
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ECE 320: Electronic 1 Question & Answer A diode connected across a relay coil is used to. Option A. dissipate coil spikes on switch off. Option B. allow the coil to energize with only one polarity. Option C. cause a delay in switching on. - ANSWER: dissipate coil spikes on switch off. A diode is parallel to an LED in an AC circuit to. Option A. provide correct amount of current for LED when circuit is switched on. Option B. prevent back EMF in the circuit when LED is switched off. Option C. protect LED from AC current when switched on. - ANSWER: protect LED from AC current when switched on. Explanation. The negative half cycle of the AC must be bypassed around the LED. A diode which emits photons when conducting is a. Option A. light emitting. Option B. varactor. Option C. zener. - ANSWER: light emitting. Explanation. Photons = light, so a diode which emits light is a Light Emitting Diode. A germanium diode is used for. Option A. rectification. Option B. voltage stabilization. Option C. modulation. - ANSWER: rectification. Explanation. Germanium diode has the least forward bias voltage drop and is best for rectification.

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