Which one of the following statements is 'WRONG' regarding LED? (a) LED's have long lifetime if properly manufactured. (b) Colours produced by LED's do not fade out. (c) LED's are energy efficient. (d) Brightness of light emitted by LED cannot be controlled.

Answer: (d). LEDs have a long life, are energy efficient and their colours do not fade: (a), (b), (c) are true. Brightness depends on the forward current, so it can be controlled by changing the current. So the wrong statement is (d).

Which one of the following statements is 'WRONG' regarding LED? | MHT CET 2026 (18 Apr, Shift 1)

Q5MHT CET 2026 · 18 APR · SHIFT 1Easy

Special Purpose Diodes

Which one of the following statements is 'WRONG' regarding LED?

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Answer: (d)

LEDs have a long life, are energy efficient and their colours do not fade: (a), (b), (c) are true.
Brightness depends on the forward current, so it can be controlled by changing the current.
So the wrong statement is (d).

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