Question

32. Calculate the electrical energy consumed by a filament lamp of power 100W in 20 minutes.
a).2000J
b).12000J
c).120000J
d).1000J​

Answer 1

Answer:

Energy is defined as the product of Power consumed and Time taken.

In terms of equation we can write it as:

⇒ Energy = Power × Time

According to the question, the amount of power consumed by the filament lamp is 100 W and the time taken is 20 minutes. We have to convert time to conventional units to get a conventional SI unit of Energy. Converting time from minutes to seconds we get:

⇒ Time = 20 min × 60 seconds = 1200 seconds

Substituting the values in the formula we get:

⇒ Energy = 100 W × 1200 seconds

⇒ Energy = 1,20,000 Joules (or) 120 kJ

Hence Option (C) is the correct answer.

Answer 2

Answer:

$\large \dag$ Given :-

• Calculate the electrical energy consumed by a filament lamp of power 100W in 20 minutes.

1. 2000J
2. 12000J
3. 120000J
4. 1000J

$\large \dag$ Answer :-

• The answer to your question is Option C [120000J].

$\large \dag$ Solutions :-

Hey mate after reading your question we come to know one concept tha t is ,

Energy = Power × time .

Here,Energy is product of both the power and time taken .

So,According to Th is concept lets apply it to your question

But one thing that is we should convert time to minutes So,

• Time = 20 × 60 = 1200seconds .

Then,Applying it to the formula we get,

• Energy = 100W × 12000sec

• Energy = 120000J.

Hope it helps u mate.

$\large \dag$ Thank you .