Question

An electric iron of resistance 25ohm takes a current of 5A. calculate the heat developed in 30 seconds​

Answer 1

Answer:

18750 J

Explanation:

We have,

=> Resistance (R) = 25 ohm

=> Electric current (I) = 5 A

=> Time taken (t) = 30 sec

To find,

Heat energy (H)

Solution,

H = I²Rt

=> 5² × 25 × 30

=> 25 × 25 × 30

∴ 18750 J