WAEC Physics 2015 Objective — Question 39

Question 39 of 50 from the West African Examinations Council (WAEC) Physics 2015 Objective paper, with the correct answer and a full explanation.

The symbol illustrated above is that of a resistor

• A. which absorbs light
• B. which emits light
• C. which absorbs heat to function properly
• D. whose resistance is light dependentCorrect

Explanation

The symbol represents a light dependent resistor (LDR), a photoconductive device whose resistance changes (decreases) with incident light intensity.

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