Question

✨✨✨✔HELLO BrAiNlY✔✨✨
Here's a Question...............Worth 20 points...

Q. Calculate the power dissipated by the element of an electric fire of Resistance 30 when a current of 10A flows in it. If the fire is on for 30 hours in a week, determine the energy used. Also determine the weekly cost of energy if electricity costs 7.2 Rs. per unit.
​

Answer 1

Thus, the total cost is ₹4356...

Answer 2

Answer:

$\: hello \: friend \\ \\ your \: answer \: is \: 648 \: rs$

Explanation:

Given that:-

R = 30 ohm

I = 10 Ampere

P = ?

P = I²R

Putting the values in it...

= (10)² × 30

= 3000 Watt

hence, power = 3Kw

According to question,

E = P × T

= 3 × 30( a whole week )

= 90Kwh

Cost of electricity = 7.2 × 90

= Rs. 648