Electronic Devices and Circuits - ECE Questions and Answers

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In the circuit of figure the function of resistor R and diode D are

to limit the current and to protect LED against over voltage

to limit the voltage and to protect LED against over current

to limit the current and protect LED against reverse breakdown voltage.

none of the above.

Answer : Option C

Explanation :

Resistance limits current and diode is reverse connected and therefore protects LED against reverse breakdown.

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