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Lighting Technology

1 UPSC Prelims MCQs tagged "Lighting Technology". Free practice with answer keys, explanations, and timed mock tests on Anantam IAS.

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  1. Why is LED (Light Emitting Diode) technology considered superior to traditional incandescent bulbs?

    Why is LED (Light Emitting Diode) technology considered superior to traditional incandescent bulbs?

    1. AOnly 1
    2. BOnly 2
    3. CBoth 1 and 2
    4. DNeither 1 nor 2
    Answer and explanation

    Correct answer: A

    Statement 1 is correct: LEDs convert a much higher share of electrical energy into light and waste far less as heat, which makes them far more efficient. Statement 2 is wrong because producing light by heating a metal filament describes the incandescent bulb, not the LED. An LED emits light when current passes through a semiconductor.

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    Science & Technology UPSC GPSC-2026 Easy