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Which of the following generates a back EMF?(a) relay(b) buffer(c) transistor(d) FETI got this question in an online interview.My doubt is from Power Controls topic in portion Interfacing to the Analog World of Embedded Systems

Answer» RIGHT answer is (a) relay

For EXPLANATION I would say: The relay generates a BACK voltage across its terminals when the logic output SWITCHES from a HIGH to low state.


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