Question

how many units of electric energy will be consumed in 10 hours by using four devices of power 500 Watt each...

Answer 1

kWh is the commercial unit of measurement of electrical energy

total power of 4 devices =4*500=2000W=2kW
t=10hrs

so electrical energy
power * time
=2*10kWh
=20kWh
1unit=1kWh
so 20 units is consumed
hope it helps you

Answer 2

$\huge \bold {\mathfrak {hey}}$

✔️ Unit of measurement of electrical energy =
$\huge {\boxed {kWh}}$

Power of 4 devices = 500 watt

In kilowatt

➡️ 500 × 4 = 2000 kilowatt

➡️ time =10 hours

Formula.

Electrical energy = Power {P} × Time {T}

Note :- $\underline {\boxed {1 unit = 1kWh}}$

So,

➡️ 2 × 10 kWh

➡️ 20 kWh

From above Note we saw that 1unit = 1kWh

Therefore,

20 units are consumed in 10 hours by using four devices.

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Hope it will help you