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 .

Step-by-step solution

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