Class 9 Exam > Class 9 Videos > Science Class 9 > Power
Power Video Lecture | Science Class 9
This video is part of 84 videos|384 docs|61 tests | Join course for free |
|
84 videos|384 docs|61 tests
|
FAQs on Power Video Lecture - Science Class 9
| 1. What is power in physics? |  |
| 2. How is power calculated? | |
Ans. Power can be calculated by dividing the amount of work done or energy transferred by the time taken to perform the work or transfer the energy. The formula for power is P = W/t, where P is power, W is work, and t is time.
| 3. What are the units of power? | |
Ans. The SI unit of power is the watt (W), which is equal to one joule per second (1 J/s). Other commonly used units of power include horsepower (hp) and kilowatt (kW).
| 4. What is the difference between power and energy? | |
Ans. Power and energy are related concepts but have different meanings. Power is the rate at which work is done or energy is transferred, whereas energy is the ability to do work or cause change. Power is measured in watts, while energy is measured in joules.
| 5. How does power relate to electrical devices? | |
Ans. In the context of electrical devices, power represents the rate at which electrical energy is converted into other forms of energy. It determines how quickly an electrical device can perform its intended function, such as producing light, heating, or mechanical work. The power rating of electrical devices is typically stated in watts or kilowatts.
About this Video
4.60/5
Rating
Apr 02, 2025
Last updated
Video Description: Power for Class 9 2025 is part of Science Class 9 preparation.
The notes and questions for Power have been prepared according to the Class 9 exam syllabus.
Information about Power covers all important topics for Class 9 2025 Exam.
Find important definitions, questions, notes, meanings, examples, exercises and tests below for Power.
Introduction of Power in English is available as part of our Science Class 9 for Class 9 & Power in
Hindi for Science Class 9 course. Download more important topics related with notes, lectures and mock test series for
Class 9 Exam by signing up for free.
Description
Video Lecture & Questions for Power Video Lecture | Science Class 9 - Class 9 full syllabus preparation | Free video for Class 9 exam to prepare for Science Class 9.
Information about Power
Here you can find the meaning of Power defined & explained in the simplest way possible.
Besides explaining types of Power theory, EduRev gives you an ample number of questions to practice Power tests,
examples and also practice Class 9 tests.
Related Searches
Exam
,Previous Year Questions with Solutions
,past year papers
,MCQs
,video lectures
,practice quizzes
,mock tests for examination
,Objective type Questions
,shortcuts and tricks
,Summary
,study material
,Extra Questions
,Viva Questions
,Semester Notes
,Power Video Lecture | Science Class 9
,ppt
,Power Video Lecture | Science Class 9
,Sample Paper
,Power Video Lecture | Science Class 9
,Free
,Important questions
;
Study Power on the App
Students of Class 9 can study Power alongwith tests & analysis from the EduRev app,
which will help them while preparing for their exam. Apart from the Power,
students can also utilize the EduRev App for other study materials such as previous year question papers, syllabus, important questions, etc.
The EduRev App will make your learning easier as you can access it from anywhere you want.
The content of Power is prepared as per the latest Class 9 syllabus.
|
© EduRev
|
Education Revolution
|
|
Signup to see your scores
go up
within 7 days!
within 7 days!
Takes less than 10 seconds to signup