Question

An electrical appliance is rated 1500 W, 250 V. This appliance is connected to 250 V mains.
Calculate :
(i) The current drawn
(ii) The electrical energy consumed in 60 hours
(iii) The cost of electrical energy consumed at Rs. 2.50/kWh.

Answer 1

We have,

$P=15W,$voltage $v=250v$

So,

(i) Electric current drawn,

$1=\frac{p}{v}=\frac{1500}{250}=6A$

(ii) Energy consumed, $E=power\times time$

$=1500\times 60$

$=9000$

(iii) Cost of energy consumed

$=90\times 2.50$

=Rs$225$