Question

A geyser is rated 1500 W, 250 V. This geyer is connected to 250 V mains. Calculate:
(i) the current drawn
(ii) the energy consumed in 50 hours, and
(iii) the cost of energy consumed at Rs. 4.20 per kWh

Answer 1

Given,
Power of geyser, p = 1500 w
Voltage, v = 250 v

(i) Current, I= `P/V`

                 I = `1500/250` = 6 A

(ii) Time, t = 50 h
Energy, E = p × t
= 1500 × 50 = 75000wh = 75kwh
(iii) Cost per unit of energy = Rs. 4.20
Cost for 75 kwh of energy = 4.20 × 75 = Rs. 315