Define power and state its SI unit?

Question

Answer

Power is the rate of doing work . SI unit of power is  ' Watt ' .

Answer

The rate of doing work is called power.
power= work done/ time.
SI unit - joule/ second(j/s)
or. Watt

Answer

Power is defined as the rate of doing work...

it's si unit is watt..

Answer

Definition of Power
Power is defined as the rate at which work is done or the amount of energy transferred or converted per unit time. In simpler terms, it measures how quickly work is done or how fast energy is transferred or converted.

SI Unit of Power
The SI unit of power is the watt (W). One watt is equivalent to one joule of energy transferred or converted per second. It is named after the Scottish engineer James Watt, who played a significant role in the development of the steam engine.

Explanation
Power is a fundamental concept in physics and is closely related to work and energy. It quantifies the amount of work done or energy transferred or converted in a given amount of time. It measures the rate at which these processes occur.

Formula for Power
Power can be calculated using the formula:

Power = Work / Time

where,
Power is measured in watts (W),
Work is measured in joules (J), and
Time is measured in seconds (s).

If the work done or energy transfer is known, and the time taken to do the work or transfer the energy is also known, the power can be calculated using this formula.

Example
For example, if a person lifts a 10 kg object to a height of 2 meters in 5 seconds, the work done can be calculated as follows:

Work = Force × Distance
= (Mass × Acceleration due to gravity) × Distance
= (10 kg × 9.8 m/s²) × 2 m
= 196 J

Using the formula for power, we can calculate:

Power = Work / Time
= 196 J / 5 s
= 39.2 W

Therefore, the power exerted by the person in lifting the object is 39.2 watts.

Conclusion
Power is a measure of how quickly work is done or energy is transferred or converted. It is measured in watts (W) and is calculated by dividing the work done or energy transferred by the time taken. This concept is important in various fields such as physics, engineering, and technology, as it helps quantify the efficiency and effectiveness of different systems and processes.

Similar Class 10 Doubts

Define electric power . give its SI unit ?

What is meant by power of lens? What does its sign ( ve or -v e) indicate ? State its si unit. How is this unit related to focal length of lens ?

In cbse paper 2020,in section c, set 3, there is question .define electric power? State its s i unit But in set 2 ,there is written define power? State its s i unit. So, it can either be electric power Or Power of lens.?

State SI unit of electric power?

Top Courses for Class 10View all

Science Class 10

Social Studies (SST) Class 10

Mathematics (Maths) Class 10

English Grammar Advanced

English Grammar Basic

Top Courses for Class 10

Top Courses for Class 10

Suggested Free Tests

Related Content

About Class 10

Class 10 Study Material

Class 10 All Subjects

NCERT Textbook Solutions

Other Classes

Important Links

Company