Question

An electric motor takes 5A from a 220 v line . Determine the power of the motor and the energy consumed in 2 hours

Answer 1

We know that,

P = VI ------------ (1)

Here,
V= 220v
I = 5A
P = ?
from equation (1) ------

P = VI

=> P = 220v × 5A

=> P = 1100W

Again,

E = P× t -----------(2)

here,

P = 1100W

t = 2h = (2×60×60)sec

From equation (2) ------

E = P×t

=> E = 1100W × (2×60×60)sec

=> E = 7. 92 × 10^6J




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Answer 2

Answer:

Electric current = 5 A

potential different = 220 V

Time = 2 x 60 x 60 = 7200

P = VI

220 x 5 V

=> 1100 w

Energy consumed by motor,

=> 1100 x 7200

=> 7.92 x 10^6 J