Question

A heater of 220 V heats a volume of water m 5 mint time. A heater of 110 V heat in ten second. The resistance of the conductor is

Options

• 0.5 mint

• 2 mint

• 4 mint

• 20 mint

Answer 1

2 mint

Explanation:

`(220)^2/R xx 5 xx 60 = (110)^2/R xx t`

`t = (220 xx 220 xx 5 xx 60)/(110 xx 110)`

= `20 xx 60`

= 120 minute

= 2 minutes.