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The power in a circuit having voltage V and current I during time interval t is:
V/I
I ├Ч V
(I ├Ч t)/V
I/V
I ├Ч V
The electric power (P) in a circuit is defined as the rate at which electrical energy is transferred by an electric circuit. It is mathematically given by the product of the electric potential difference (V) across the circuit and the electric current (I) flowing through it.
The electric power (P) in a circuit is defined as the rate at which electrical energy is transferred by an electric circuit. It is mathematically given by the product of the electric potential difference (V) across the circuit and the electric current (I) flowing through it.
Think of electrical power like water flowing through a pipe: voltage (V) is the water pressure pushing the water, and current (I) is the volume flow rate of the water. The total power or work the water can do depends on both the pressure and how much water is flowing per second.
Remember 'PIE' or 'PVI': Power equals Voltage times Current (P=V├ЧI).
P=V├ЧI тАФ Electric power in terms of voltage and current
P=I2├ЧR тАФ Electric power in terms of current and resistance
P=RV2тАЛ тАФ Electric power in terms of voltage and resistance
Electric power quantifies the work done per unit time in moving charge through a potential difference. Since potential difference V=W/Q (work per charge) and current I=Q/t (charge per time), their product V├ЧI=(W/Q)├Ч(Q/t)=W/t, which represents energy transferred per unit time (Power).
Electric power is the rate of consumption or generation of electrical energy.
The SI unit of electric power is the Watt (W) or Joules per second (J/s).
Derived from Ohm's Law (V=I├ЧR), power can also be expressed using resistance.
Higher voltage or higher current results in greater electrical power.
Allows direct calculation of energy consumption in electrical appliances.
Helps in determining appropriate fuse ratings and wire thicknesses for safety.
Does not account for power factor losses in AC circuits without additional parameters.
Rating electrical home appliances like heaters, bulbs, and motors.
Calculating power losses in transmission lines (P=I2R).
1 horsepower (hp) is approximately equal to 746 Watts.
Option A (V/I) represents Resistance (R) according to Ohm's law.
Option C ((I├Чt)/V) is dimensionally incorrect for power.
Option B is correct тАФ Electric power is the product of voltage and current (I├ЧV).
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