A resistor develops 300 J of thermal energy in 15 s , when a current of 2 A is passed through it. If the current increases to 3 A , the energy developed in 10 s is _____ J .

Question

A resistor develops 300 J of thermal energy in 15 s , when a current of 2 A is passed through it. If the current increases to 3 A , the energy developed in 10 s is _____ J .,

MARKS App · Accepted Answer

Energy produced is given by H = i 2 R t When i = 2 A , t = 15 s , energy is H = 300 = 2 2 × R × 15 Resistance is R = 5 Ω When i = 3 A , t = 10 s . Energy is H ' = 3 2 × 5 × 10 = 450 J

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