Class 10 Exam > Class 10 Questions > An electric bulb is marked 18watt-240 volt. I...
Start Learning for Free
An electric bulb is marked 18watt-240 volt. If it is used across 240 V power line for one hour daily, calculate the number of days to consume 1 unit of electric energy.
- a)54.5 days
- b)57.5 days
- c)50.5 days
- d)55.5 days
Correct answer is 'D'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Verified Answer
An electric bulb is marked 18watt-240 volt. If it is used across 240 V...
Let n be the number of days
Here, work done is 36 x 105 J = (18 J/s) x n x 1 x 60 x 60
Thus, n = 55.5 days
Most Upvoted Answer
An electric bulb is marked 18watt-240 volt. If it is used across 240 V...
Any references books related to this lesson.u will get idea to do this sums.
Free Test
FREE
| Start Free Test |
Community Answer
An electric bulb is marked 18watt-240 volt. If it is used across 240 V...
Given:
- Power of the electric bulb = 18 watts
- Voltage across the bulb = 240 volts
- Time of usage per day = 1 hour
To find:
Number of days to consume 1 unit of electric energy
Formula:
Electric energy (in units) = Power (in watts) × Time (in hours) ÷ 1000
Calculation:
1) First, we need to calculate the electric energy consumed by the bulb in one day.
Electric energy (in units) = Power (in watts) × Time (in hours) ÷ 1000
Electric energy (in units) = 18 watts × 1 hour ÷ 1000
Electric energy (in units) = 18 watt-hours ÷ 1000
Electric energy (in units) = 0.018 units
2) Next, we need to calculate the number of days to consume 1 unit of electric energy.
Number of days = 1 unit ÷ Electric energy consumed per day
Number of days = 1 unit ÷ 0.018 units
Number of days = 55.555...
Approximation:
Since we cannot have partial days, we need to round the number of days to the nearest whole number.
Rounded number of days = 56 days
Therefore, the number of days required to consume 1 unit of electric energy is 56 days, which is closest to option D (55.5 days).
- Power of the electric bulb = 18 watts
- Voltage across the bulb = 240 volts
- Time of usage per day = 1 hour
To find:
Number of days to consume 1 unit of electric energy
Formula:
Electric energy (in units) = Power (in watts) × Time (in hours) ÷ 1000
Calculation:
1) First, we need to calculate the electric energy consumed by the bulb in one day.
Electric energy (in units) = Power (in watts) × Time (in hours) ÷ 1000
Electric energy (in units) = 18 watts × 1 hour ÷ 1000
Electric energy (in units) = 18 watt-hours ÷ 1000
Electric energy (in units) = 0.018 units
2) Next, we need to calculate the number of days to consume 1 unit of electric energy.
Number of days = 1 unit ÷ Electric energy consumed per day
Number of days = 1 unit ÷ 0.018 units
Number of days = 55.555...
Approximation:
Since we cannot have partial days, we need to round the number of days to the nearest whole number.
Rounded number of days = 56 days
Therefore, the number of days required to consume 1 unit of electric energy is 56 days, which is closest to option D (55.5 days).
Attention Class 10 Students!
To make sure you are not studying endlessly, EduRev has designed Class 10 study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Class 10.
|
Explore Courses for Class 10 exam
|
|
Similar Class 10 Doubts
Top Courses for Class 10View all
An electric bulb is marked 18watt-240 volt. If it is used across 240 V power line for one hour daily, calculate the number of days to consume 1 unit of electric energy.a)54.5 daysb)57.5 daysc)50.5 daysd)55.5 daysCorrect answer is 'D'. Can you explain this answer?
Question Description
An electric bulb is marked 18watt-240 volt. If it is used across 240 V power line for one hour daily, calculate the number of days to consume 1 unit of electric energy.a)54.5 daysb)57.5 daysc)50.5 daysd)55.5 daysCorrect answer is 'D'. Can you explain this answer? for Class 10 2024 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about An electric bulb is marked 18watt-240 volt. If it is used across 240 V power line for one hour daily, calculate the number of days to consume 1 unit of electric energy.a)54.5 daysb)57.5 daysc)50.5 daysd)55.5 daysCorrect answer is 'D'. Can you explain this answer? covers all topics & solutions for Class 10 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for An electric bulb is marked 18watt-240 volt. If it is used across 240 V power line for one hour daily, calculate the number of days to consume 1 unit of electric energy.a)54.5 daysb)57.5 daysc)50.5 daysd)55.5 daysCorrect answer is 'D'. Can you explain this answer?.
An electric bulb is marked 18watt-240 volt. If it is used across 240 V power line for one hour daily, calculate the number of days to consume 1 unit of electric energy.a)54.5 daysb)57.5 daysc)50.5 daysd)55.5 daysCorrect answer is 'D'. Can you explain this answer? for Class 10 2024 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about An electric bulb is marked 18watt-240 volt. If it is used across 240 V power line for one hour daily, calculate the number of days to consume 1 unit of electric energy.a)54.5 daysb)57.5 daysc)50.5 daysd)55.5 daysCorrect answer is 'D'. Can you explain this answer? covers all topics & solutions for Class 10 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for An electric bulb is marked 18watt-240 volt. If it is used across 240 V power line for one hour daily, calculate the number of days to consume 1 unit of electric energy.a)54.5 daysb)57.5 daysc)50.5 daysd)55.5 daysCorrect answer is 'D'. Can you explain this answer?.
Solutions for An electric bulb is marked 18watt-240 volt. If it is used across 240 V power line for one hour daily, calculate the number of days to consume 1 unit of electric energy.a)54.5 daysb)57.5 daysc)50.5 daysd)55.5 daysCorrect answer is 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 10.
Download more important topics, notes, lectures and mock test series for Class 10 Exam by signing up for free.
Here you can find the meaning of An electric bulb is marked 18watt-240 volt. If it is used across 240 V power line for one hour daily, calculate the number of days to consume 1 unit of electric energy.a)54.5 daysb)57.5 daysc)50.5 daysd)55.5 daysCorrect answer is 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
An electric bulb is marked 18watt-240 volt. If it is used across 240 V power line for one hour daily, calculate the number of days to consume 1 unit of electric energy.a)54.5 daysb)57.5 daysc)50.5 daysd)55.5 daysCorrect answer is 'D'. Can you explain this answer?, a detailed solution for An electric bulb is marked 18watt-240 volt. If it is used across 240 V power line for one hour daily, calculate the number of days to consume 1 unit of electric energy.a)54.5 daysb)57.5 daysc)50.5 daysd)55.5 daysCorrect answer is 'D'. Can you explain this answer? has been provided alongside types of An electric bulb is marked 18watt-240 volt. If it is used across 240 V power line for one hour daily, calculate the number of days to consume 1 unit of electric energy.a)54.5 daysb)57.5 daysc)50.5 daysd)55.5 daysCorrect answer is 'D'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice An electric bulb is marked 18watt-240 volt. If it is used across 240 V power line for one hour daily, calculate the number of days to consume 1 unit of electric energy.a)54.5 daysb)57.5 daysc)50.5 daysd)55.5 daysCorrect answer is 'D'. Can you explain this answer? tests, examples and also practice Class 10 tests.
|
|
Explore Courses for Class 10 exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup