A geyser is rated 1500 W, 250 V. It 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 ₹2.20 per kWh.

Explanation

Given, `V = 250 V, P = 1500 W, t = 50 h = 50 xx 60 xx 60 s`
(i) `I= (P)/(V)= (1500)/(250)= 6A`
(ii) Energy consumed = VI t joule
`= 250 xx 6 xx 50 xx 60 xx 60`
`=27 xx 10^(7)J`
`(27 xx 10^(7))/(3.6xx 10^(6))"kWh"= 75 kWh`
1kWh costs = ₹2.20
`75 kWh cost = 2.20 xx 75 = ₹165`