Question

A geyser has a rating 200w,240v.what is the electrical energy consumed by it in kWh if used 1hr.each day for 30days. If the cost of electricity is Rs 3.50per commercial unit,find the total cost

Answer 1

Answer:

We have ,

power = 200watts and p.d. = 240 volts

from P=VI

200=240 × I

200÷240 =I

5/6=I

0.8333... amperes =I

Now,

E= P×T

E = 2.4 × 1

electrical energy consumed in 1 day = 2.4 kWh

cost of 1 unit of electricity = ₹ 3.50

electrical energy consumed in 30 days = 30×2.4

= 7.20 kWh

cost of 7.20 units of electricity = ₹ ( 7.20 × 3.50 )

= ₹ 25.2