Electronics and Communication Engineering - Electronic Devices and Circuits - Discussion

Discussion Forum : Electronic Devices and Circuits - Section 1 (Q.No. 10)

Electronic Devices and Circuits

10.

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

Explanation:

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

Discussion:

14 comments Page 2 of 2.

Sandeep said: 8 years ago

Agree @Aman.

Sandeep said: 8 years ago

I am not understanding that how to diode conducting under more than breakdown v/g because diode work in the forward bias.

Dileep reddy said: 7 years ago

What is reverse break down?

Preman said: 7 years ago

How the symbol of variable resistance (potentiometer) becomes a resistor? and why the symbol of LED is wrong?

Anyone explain this in clear.

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