A geyser has a rating of 2 kW, 240 V. What is the cost of using it for 30 minutes if the cost of electricity is Rs. 3 per commercial units?

Rs. 2

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Rs. 4

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Rs. 5

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Rs. 3

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Solution

The correct option is D
Rs. 3

Given: Power (P) = 2 kW and Voltage (V) = 240 V

Time = 30 min = 0.5 hours

We know that Electrical energy consumed = Power x Time

= 2 kW x 0.5 hours

= 1 kWh (or 1 commercial unit)

$∴$ Cost of electricity = Rs. 3 x 1 = Rs. 3

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A geyser has a rating of 2 kW, 240 V. What is the cost of using it for 30 minutes if the cost of electricity is Rs. 3 per commercial units?

The correct option is D Rs. 3 Given: Power (P) = 2 kW and Voltage (V) = 240 V Time = 30 min = 0.5 hours We know that Electrical energy consumed = Power x Time = 2 kW x 0.5 hours = 1 kWh (or 1 commercial unit) ∴ Cost of electricity = Rs. 3 x 1 = Rs. 3

The correct option is D
Rs. 3

Given: Power (P) = 2 kW and Voltage (V) = 240 V

Time = 30 min = 0.5 hours

We know that Electrical energy consumed = Power x Time

= 2 kW x 0.5 hours

= 1 kWh (or 1 commercial unit)

$∴$ Cost of electricity = Rs. 3 x 1 = Rs. 3