Question

A 200 W electric fan is used for 10 hours every day.how much electricity does it consumes each day
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Answer 1

Answer:

$\boxed{\boxed{\bold{2 kWh}}}$    

Given:

• Power, P= 200 W = 200 ÷ 1000 = 0.2 kW

• Time, T = 10 hours

To Find:

Electricity consumed each day by the fan= ?

Kilowatt-hour is the unit of electrical energy.

Steps:

1. Since electricity is sold in units of kilowatt- hour, we should first convert the power consumed in watts into kilowatts by dividing the total watts by 1000.
2. The kilowatts are then converted into kilowatt-hour by multiplying the kilowatt by the number of hours for which the appliance has been used.
3. This gives us the total electrical energy consumed in kilowatt-hour .

$\boxed{\bold{Solution:}}$

Electrical energy consumed(Units) = Power(in kilowatt) × Time(in hour)

                                                       = 0.2 × 10

                                                       = $\boxed{\boxed{\bold{2 kWh}}}$    

∴The electric fan consumes 2kWh energy each day