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Consider these statements: (I) a Zener diode is not used as a voltage stabiliser, (II) a solar cell is a p-n junction diode that converts electrical energy into solar energy, and (III) LEDs are an important light source used in optical communication. Which is correct?

1. Consider these statements: (I) a Zener diode is not used as a voltage stabiliser, (II) a solar cell is a p-n junction diode that converts electrical energy into solar energy, and (III) LEDs are an important light source used in optical communication. Which is correct?

 

Only statement III holds true. Statement I is false, since Zener diodes are widely used as voltage stabilisers. Statement II has it backwards — a solar cell converts light energy INTO electrical energy, not the reverse.

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