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An electric heater is rated 1500 W. How much energy does it us

Science

Class 9

NCERT

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A person holds a bundle of hay over his head for

30

minutes and gets tired. Has he done some work or not? Justify your answer.

An electric heater is rated

1500 W

. How much energy does it use in

10

hours?

Illustrate the law of conservation of energy by discussing the energy changes which occur when we draw a pendulum bob to one side and allow it to oscillate. Why does the bob eventually come to rest? What happens to its energy eventually? Is it a violation of the law of conservation of energy?

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Question

Easy

Solving time: 2 mins

An electric heater is rated $1500 W$ . How much energy does it use in $10$ hours?

Views: 6,188 students

Updated on: Jun 2, 2023

Book:

Science (NCERT)

Found 2 tutors discussing this question

Sebastian Discussed

An electric heater is rated

1500 W

. How much energy does it use in

10

hours?

12 mins ago

Discuss this question LIVE

12 mins ago

Text solutionVerified

Time for which the heater is used

t = 10

hours

= 10 \times 3600

= 36000

Energy consumed by the heater

E = P \times t

where

P

is the power of the heater

∴

E = (1500)

\times 36000

⟹ E = 5.4 \times 1 0^{7}

E = 15

kWh

(∵ 1 kWh = 3.6 \times 1 0^{6} J)

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Practice more questions from Science (NCERT)

A person holds a bundle of hay over his head for

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minutes and gets tired. Has he done some work or not? Justify your answer.

An electric heater is rated

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Question Text	An electric heater is rated $1500 W$ . How much energy does it use in $10$ hours?
Updated On	Jun 2, 2023
Topic	Work and Energy
Subject	Science
Class	Class 9
Answer Type	Text solution:1 Video solution: 11
Upvotes	1239
Avg. Video Duration	3 min

An electric heater is rated $1500 W$ . How much energy does it use in $10$ hours?

Text solutionVerified

Filo tutor solutions (11)

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