Question

40w का एक लंब प्रतिदिन 10 घंटे प्रयोग किया जाता है 10 दिन में खर्च की गई विद्युत ऊर्जा का यूनिट में परिवर्तन कीजिए​

Answer 1

Given:

40W का एक लंब प्रतिदिन 10 घंटे प्रयोग किया जाता है

To find:

10 दिन में खर्च की गई विद्युत ऊर्जा का यूनिट में परिवर्तन कीजिए​

Solution:

We know,

$\boxed{\bold{Energy = Power \times Time}}$

The power of the lamp = 40 W = $\frac{40}{1000} \:kW = 0.04 \:kW$ . . . . [∵ 1 W = $\frac{1}{1000 }\:kW$]

The no. of hours every day the lamp is used for = 10 hours

By using the above formula of the energy, we get

The energy consumed in 1 day = 0.04 kW × 10 hours = 0.4 kWh

Now,

The total energy consumed in 10 days will be,

= 0.4 kWh × 10 days

= 4 kWh

∵ $\boxed{1\: kWh = 1 \:unit}$

= 4 units

Thus, the electrical energy consumed in 10 days in units is → 4 units.

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