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.

Reena said: 7 years ago

Is this zener diode or else?

(1)

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.

Abi said: 3 years ago

How it works? Please explain.

(1)

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