Question

An electric iron consumes a current of 2a when connectrd to a 220v supply. If iron is used for 3hours a day find energy consumption per month

Answer 1

Answer:

the formula of energy is power ×time .

power= voltage ×ampere

220 × 2

440 watt

time = 30 × 3

90 hour

the energy is = 440 × 90

3960 joule

Answer 2

Answer:

GIVEN:

current (I)=2 A

volt (V)=220 V

time(t)=3 hours

Explanation:

power=VI

          =220 x 2=440 watt

Energy=power(in watt) x time(hours)/1000

          =440 x 3/1000

           =1.32 kWh

Energy consumption per month=1.32 x 30  [ 1 month=30 days]

                                                = 39.6 kWh