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Which allows the switching of DC motor by using two outputs and four FETs?

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Which allows the switching of DC motor by using two outputs and four FETs?

(a) transistor

(b) H bridge

(c) darlington pair

(d) buffer pack

This question was addressed to me in an international level competition.

My question is from Power Controls in division Interfacing to the Analog World of Embedded Systems

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Correct choice is (b) H bridge

For explanation I would say: The H bridge can be created by using several switches which allows a DC motor to be switched on and reversed in the direction. The switching can be done by using two outputs and four FETs.

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