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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.
Electric Power. In physics, electric power measures the rate of electrical energy transfer by an electric circuit per unit of time. Denoted by P and measured using the SI unit of power which is watt or one joule per second. Electric power is commonly supplied by electric batteries and produced by electric generators. Table of Contents:
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. If set A = {x, y, z} is a set, then all its subsets {x}, {y}, {z}, {x, y}, {y, z}, {x, z}, {x, y, z} and ...
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 ...
Power: A body is said to have one watt of power if it can perform one joule of work in one second. Power is defined as the rate at which work is performed, or energy is converted. P o w e r (P) = w o r k (w) t i m e (t) = J s; The SI unit of power is the watt. Other power units include ergs per second, horsepower, metric horsepower (CV), and ...
Electrical energy is the energy derived from electric potential energy or kinetic energy of the charged particles. In general, it is referred to as the energy that has been converted from electric potential energy. We can define electrical energy as the energy generated by the movement of electrons from one point to another.
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
Solved Questions. Example 1: Write 7 x 7 x 7 x 7 x 7 x 7 x 7 x 7 in exponent form. Solution: In this problem 7s are written 8 times, so the problem can be rewritten as an exponent of 8. 7 x 7 x 7 x 7 x 7 x 7 x 7 x 7 = 78. Example 2: Write below problems like exponents: 3 x 3 x 3 x 3 x 3 x 3. 7 x 7 x 7 x 7 x 7.
Thus, we define the power of the lens as the reciprocal of the focal length of the lens used. It is given as, 1/f. Where f is the focal length of the lens used. SI unit of power is Dioptre (D). The power of the concave lens is negative, while the power of the convex lens can be positive. Watch the video and learn more about longitudinal ...
