Question

If a 100 watts bulbs on for 10 hours, then what will be the amount of consumed electricity

Answer 1

ANSWER
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100 watt = 0.1 kilowatt
time = 10 hours

1 kWh = 3.6 * 10^6 joules of energy

ENERGY CONSUMED (E) =
POWER IN KILOWATT (p) × TIME IN HOUR (t)

E = p × t
E = 0.1 × 10
E = 1 unit

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ENERGY CONSUMED = 1 unit
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HOPE IT HELPS :):):):):):):):)):):)

Answer 2

The amount of consumed electricity is $6 \times {10}^{5} joule$ or 1 unit.

Given:

A 100 watts bulb is on for 10 hours.

To Find:

The amount of consumed electricity.

Solution:

To find the amount of consumed electricity we will follow the following steps:

As we know,

Power is the amount of work done or energy dissipation in the form of heat in a given time.

The formula of power =

$\frac{energy}{time}$

Time in seconds.

The unit of power is Nm/s, kgm²/s³, or watt.

Also,

In the case of resistor power =

$\frac{ {v}^{2} }{r} = vi$

Here, v is voltage, i is current and r is resistance.

According to the question:

p = 100 watts

Time = 10 hours = 10 × 60 × 60 = 6000sec

(As 1 hour = 60 min and 1 min = 60 sec)

power = 100 watts = 0.1 kilowatt

Now,

$energy = power \times time$

$energy = 100 \times 6000 = 6 \times {10}^{5} joule$

Also,

1 kwh = 1 unit

Here, Power in kilo and time in n hour

So,

Energy = power x time = 0.1 × 10 = 1 Kwh = 1 unit

Henceforth, The amount of consumed electricity is $6 \times {10}^{5} joule$ or 1 unit.

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