There are ' n ' number of identical electric bulbs, each is designed to draw a power p independently from the mains supply. They are now joined in series across the main supply. The total po

Question

There are ' n ' number of identical electric bulbs, each is designed to draw a power p independently from the mains supply. They are now joined in series across the main supply. The total power drawn by the combination is :

TestHub · Accepted Answer

​ R s ​ = R 1 ​ + R 2 ​ + R 3 ​ + …… .. + R n ​ P s ​ V 2 ​ = P V 2 ​ + P V 2 ​ + …… . + P n ​ V 2 ​ P s ​ = n P ​ ​

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