power

- The rate at which
__energy__is expended, or at which__work__is performed. Its__symbol__is, its abbreviation is pwr, and it is usually expressed in watts, or some multiple of watts, such as megawatts. When dealing specifically with the rate at which electric energy is utilized in a*P*__DC circuit__or system, it is__equal__to the potential difference, expressed in volts, multiplied by the__current__, expressed in amperes. In an__AC circuit__or system,__true power__is the rate at which work is performed or energy is transferred, apparent power is the product of the RMS current and the RMS voltage, while reactive power is the power in an AC__circuit__which cannot perform work. Also called electric power (1). - A
__number__indicating the exponent to which another number, the__base__, is raised. For example, in 2^{8}, the__8__is the power, and the 2 is the base. Also called exponent. - The product obtained when multiplying a given
__number__by a given power (3). For instance, in 2^{8},2 is raised to the 8^{th}power, which results in 256. - The multiplication of a given
__number__or__value__by another, to express a multiple of a given__standard__or reference. For instance, 256X over-sampling, or a 64x__DVD drive__. - A measure of the ability of a
__lens__, or__optical system__, to magnify an__image__or__object__. - abbreviation pwr

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