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- Dictionarypower/ˈpaʊə/
noun
- 1. the ability or capacity to do something or act in a particular way: "the power of speech" Similar Opposite
- 2. the capacity or ability to direct or influence the behaviour of others or the course of events: "a political process that offers people power over their own lives"
verb
- 1. supply (a device) with mechanical or electrical energy: "the car is powered by a fuel-injected 3.0-litre engine"
- 2. move or travel with great speed or force: "he powered round a bend"
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What is Power? We can define power as the rate of doing work, it is the work done in unit time. The SI unit of power is Watt (W) which is joules per second (J/s). Sometimes the power of motor vehicles and other machines is given in terms of Horsepower (hp), which is approximately equal to 745.7 watts.
Work, Energy and Power are fundamental concepts of Physics. Work is said to be done when a force (push or pull) applied to an object causes a displacement of the object. We define the capacity to do the work as energy. Power is the work done per unit of time. This article discusses work, energy and power in detail.
The power set is a set which includes all the subsets including the empty set and the original set itself. It is usually denoted by P. Power set is a type of sets, whose cardinality depends on the number of subsets formed for a given set.
Electric Power Problems. Based on the information given above, try the application problem given below: Example: A 9V battery is connected to a resistor having a resistance of 10 Ω. What is the current and power across the resistor? Solution: I = V/R = 9/10 = 0.9 A. P = VI = 9 × 0.9 = 8.1 J/s or 8.1 W
The division of ‘a’ raised to the power ‘m’ and ‘b’ raised to the power ‘m’ is equal to the division of ‘a’ by ‘b’ whole raised to the power ‘m’. Example: 5 2 /6 2 = (5/6) 2. Solved Questions. Example 1: Write 7 x 7 x 7 x 7 x 7 x 7 x 7 x 7 in exponent form. Solution:
A high power factor indicates that the power supplied to the electrical system is effectively used. A system with low power factor doesn’t effectively consume the incoming electric supply and results in losses. There is no power factor involved in DC circuits due to zero frequency. But, in AC circuits, the value of power factor always lies ...
What Is Electric Power? Electric power Definition – It is the rate at which work is done or energy is transformed in an electrical circuit. Simply put, it is a measure of how much energy is used in a span of time. In physics, the rate of transfer of electrical energy by an electrical circuit per unit time is called electrical power. Here ...
Power (P) = Work × time-1. Or, P = [M 1 L 2 T-2] × [T-1] = M 1 L 2 T-3. Therefore, power is dimensionally represented as M 1 L 2 T-3. ⇒ Check Other Dimensional Formulas: Dimensions of Acceleration Due To Gravity; Dimensions of Magnetic Flux; Dimensions of Wavelength; Dimensions of Surface Energy; Dimensions of Gravitational Potential Energy
The Power Formula is used to compute the Power, Resistance, Voltage or current in an electrical circuit. The standard metric unit of power is the Watt. Solved Examples. Problem 1: An electric machine makes use of 300 J of energy to do work in 10s. How much power does it use? Answer: Known: Work done = W = 300 J, Time taken t = 10 s.
The prudential reasons stress that power-sharing will bring out better outcomes, whereas the moral reasons emphasise the act of power-sharing as valuable. Form of Power Sharing. Most of you must think that sharing power = dividing power = weakening the country. A similar thing was believed in the past. It was assumed that all the power of a ...
