Question

Find the amount of current flowing through an electric oven
of
resistance 20ohm is 15000J of heat is produced in it in 30 sec.​

Answer 1

Given parameters :  Resistance, R = 20 Ω

                                 Heat produced, H = 15000 J

                                 Time, t = 30 s

To find :  Current, I = ?

Formula to be used :  H = I²Rt

⇒ 15000 = I² × 20 × 30

⇒ 15000 = I² × 600

⇒ I² = 15000/600

⇒ I² = 25

⇒ I = √25

⇒ I = √5²

⇒ I = 5

Hence, the amount of current flowing through the electric oven is 5 A.