Question

An electric bulb of 100watts is used for three days calculate the electrical energy consumed per day. ​

Answer 1

Answer:

So, the electrical energy consumed per day is 7.2 kWh

Answer 2

Answer:

• The electrical energy consumed per day is 7.2 kWh.

Explanation:

Given :

• Power (P) = 100 watts means 0.1 kW.

• Number of days, it was used = 3 days.

To Find :

• Electrical energy.

Calculation :

Here it's provided that an electric bulb of 100 watts [means 0.1 kW] is used for three days.

Firstly, let's calculate that how much time was spent on using the electric bulb for three days.

• Time taken for 1 day,

$\mapsto \sf 24 \: hours$

• Time taken for 3 days,

$\mapsto \sf 24 \: hours \times 3$

$\mapsto \bf 72 \: hours$

Henceforth, time taken by an electric bulb [which was used for three days] is 72 hours.

$\dag$ According to the Question,

Now, coming to the question. It's asked to calculate the electrical energy consumed per day.

To calculate the energy, we'll use this formula,

Formula used :

• $\boxed{ \rm{ \gray{Energy = Power \times Time \: taken }}}$

Here,

• Power → 0.1 kW
• Time taken → 72 hours

$\dag$ Putting the values,

$\mapsto \sf Energy = 0.1 \: kW \times 72 \: h m$

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀

• On multiplying 0.1 kW with 72 h,

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀

$\mapsto\boxed{\bf Energy = 7.2 \: kWh} \: \blue{ \bigstar}$

Therefore,

• The electrical energy consumed per day is 7.2 kWh.