Physics, asked by Puneetsingh7, 1 year ago

A lamp consumes 50 J of electrical energy in 20 seconds. What is the power of the lamp? Also find the electrical energy consumed in commercial units if the lamp operate for 2 hours daily for 15 days

Answers

Answered by diiiixit2

p=w/t
p=50/20
p=2.5watt.
units=watt×hrs×days/1000
=2.5×2×15/1000
=0.075unit

Answered by UtkarshChamoli9801

$power = \frac{50}{20} \\ = 2.5w \\ electrical \: energy \: consumed \: in \: 15days = 2.5 \times 2 \times 15 \\ = 0.075kwh.....answer$

diiiixit2: it is wrong u should find in kwhrs

UtkarshChamoli9801: then it will be 0.075kwh

diiiixit2: no

UtkarshChamoli9801: ur ans is wrong observe it carefully

UtkarshChamoli9801: u hav divided by 1000 but shifted decimal place just upto 2

diiiixit2: its 3 0.075

UtkarshChamoli9801: how it can be?? 2.5×2×15=75 and when divided by 1000 it is 0.075

diiiixit2: ya who said its wrong

UtkarshChamoli9801: first u wrote 0.75kwh

diiiixit2: oh its typing mistake

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