- #1
smruti
- 20
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in the calculation of complex power S=VI we sometimes use S=VI* and sometimes as S=V*I.what is the physical significance of these two notations and in which case these two expression has different meaning?
... erk: here let's tidy that up a bit:S[apparent power]= VxI*=(Vre)x(Ire+jIim)=(VrexIre)+(VrexIim)j and Q=+Vre*Iim.
The formula for calculating power using S=VI is simply multiplying the voltage (V) by the current (I). This formula is known as the "power equation" and is commonly used in electrical and electronic calculations.
The symbol V represents voltage, which is the potential difference between two points in an electrical circuit. The symbol I represents current, which is the flow of electric charge through a conductor.
Power is directly proportional to both voltage and current. This means that as voltage and current increase, the power also increases. In other words, if either the voltage or current increases, the power will increase as well.
The V*I meaning in the power equation represents the product of voltage and current. This is the fundamental relationship in determining the amount of power in a circuit. It shows that power is dependent on both voltage and current.
Yes, the units for power are watts (W), which is equal to one joule per second (J/s). This means that one watt of power is equivalent to one joule of energy being transferred per second.