Question

An electric motor takes 7 ampere from a 220 volt line determine the power and energy consumed in 5 hours

Answer 1

Answer:

7.7 kwh

Explanation:

I = 7 A

V = 220 v

P = V I

P = 220 x 7

P = 1540 W

energy consumed in kwh =  power x time in hour / 1000

energy consumed in kwh = 1540 x 5 / 1000

energy consumed in kwh  = 7.7 kwh

Answer 2

GIVEN

• Voltage (V) = 220 V
• Current (I) = 7 A
• Time (t) = 5 h = 5 x 60 x 60 = 18000 s

FORMULA TO BE USED

• P = V × I
• Energy consumed by the motor = P x t

POWER CALCULATION

• P = 220 x 7
• P = 1540 W

ENERGY CALCULATION

• E = 1540 x 18000
• E = 27.72 x 10⁶ J

RESULTS

• Power of the motor = 1540 W
• Energy consumed by the motor = 27.72 x 10⁶ J