Question

19. A 100-W electric bulb is used for five hours. How much energy is consumed by the bulb?
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Answer 1

$\huge{\underline{\underline{\red{\mathfrak{AnSwEr :}}}}}$

Given :

• Potential Difference (V) = 100 W
• Time Interval (t) = 5 hrs

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To Find :

• Energy Consumed

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Solution :

We have formula for Energy :

$\large{\boxed{\sf{Energy \: = \: V \: \times \: t}}} \\ \\ \implies {\sf{Energy \: = \: 100 \: \times \: 5}} \\ \\ \implies {\sf{Energy \: = \: 500}} \\ \\ {\underline{\sf{\therefore \: Energy \: Consumed \: is \: 500 \: Wh}}}$

Answer 2

$\huge{\underline{\underline{\bf{Solution}}}}$

$\rule{200}{2}$

$\tt given\begin{cases} \sf{Power \: Consumed = 100 \: W} \\ \sf{Time \: taken = 5 \: hours} \end{cases}$

$\rule{200}{2}$

$\Large{\underline{\underline{\bf{To \: Find :}}}}$

We have to find the total energy consumed.

$\rule{200}{2}$

$\Large{\underline{\underline{\bf{Explanation :}}}}$

We know the formula to find the energy consumed.

$\Large{\star{\boxed{\rm{Energy = Power \times time}}}}$

_________________[Put Values]

$\tt{\mapsto Energy = 100 \times 5} \\ \\ \tt{\mapsto Energy = 500 \: Wh}$

$\Large{\boxed{\rm{Energy = 500 \: Wh}}}$