An electric heater is used on 220 V and takes a current of 5 A. What's its power?
Calculate the per hour cost of using the heater if 1 unit costs Rs. 6.0.
Answers
Answered by
5
As we know P = V×I
So, P = 220 × 5 = 1100 watts = 1.1 kW
Total units for 1 hr = 1.1 kW × 1 hr = 1.1 kWh = 1.1 units.
Now if 1 unit costs Rs 6
Then 1.1 units will cost Rs (1.1×6) = Rs 6.6
Hope it helps
So, P = 220 × 5 = 1100 watts = 1.1 kW
Total units for 1 hr = 1.1 kW × 1 hr = 1.1 kWh = 1.1 units.
Now if 1 unit costs Rs 6
Then 1.1 units will cost Rs (1.1×6) = Rs 6.6
Hope it helps
mohammedsafwansyed:
you did not convert to Kwh which is important therefore the ans is 6.6 rs
Well that changes the whole question. thanks
But time isnt given and so I think the unit here doesnt refer to kwh. So it is right I think
Ok I found my mistake now
Corrected
thanks for helping bro
Answered by
7
As per formula P=V*I
So,220*5
1100w
1.1KWH
IF ONE UNIT COST IS 6 THEN
1.1*6
6.6 IS ANS
my pleasure
Similar questions