Waec Model Questions Vol1 2021 Mathematics Question 29
Practice objective / multiple choice question 29 from the 2021 Waec Model Questions Vol1 Mathematics examination.
The intensity I (in lux) of a light source varies directly as the power P of the source and inversely as the square of the distance d from the source. The power P varies inversely as the resistance R of the circuit supplying the source. At a distance of 5 m and a resistance of 10 Ω the intensity is 80 lux. Find the intensity when the distance is 8 m and the resistance is 5 Ω.
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About This Question
This is Waec Model Questions Vol1 2021 Mathematics Question 29. It is one of the objective questions from the 2021 Waec Model Questions Vol1 Mathematics examination.
Difficulty level: Medium .
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