Lesson: Chapter 11 — Electronics

LEDs and solar cells 4 of 4 Reset answers

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Question 4

Why are white LEDs replacing filament bulbs?

A They are hotter B They use little energy and last about 50 000 hours C They give ultraviolet light D They need no power

The right answer is the one marked above.

They use little energy and last about 50 000 hours. They also waste little energy as heat.

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