0
Strictly speaking, it's energy flow that has direction -the term 'power' merely describes the rate at which that energy is flowing. Having said that, however, the term 'power flow' is indeed used, but it must be understood that the term is really describing the 'rate at which energy is flowing'.
There is no direct relationship between the direction of current and the direction of 'power'. For example, an alternating current is continually changing direction, while the resulting power flow acts continuously in the same direction.
The reason for this is that current flow direction cannot be taken in isolation, as it must be considered together with the direction of the potential difference that is causing that current to flow. If we allocate positive and negative symbols to specify the direction of potential difference and current, where (for example) 'positive' defines a clockwise direction around the circuit, then the product of the two positive signs result in a positive direction for power flow direction. If we now reverse the direction of the potential difference and the current, their signs both become negative, and the product of two negatives is a positive -indicating that the power does not reverse direction, but continues in the same direction.
What else can I help you with?
What is the Mathematical relationship between electrical power and the number of coils of wire?
There is none. There is a relationship between voltage and current and turns ratios in a transformer. But this rule remains - power in = power out. You don't get anything for free.
What is the relationship between voltage power and current?
The unit of power is watts, the unit of current is amps, and the unit of voltage it volts. Power = Voltage X Current Voltage = Power / Current Current = Power / Voltage In electricity, power is symbolized with a P, current with an I, and voltage with a V. The real formula looks like: P = V x I V = P / I I = P / V
How do you know when electric current is flowing in a light bulb circuit?
You know if current is flowing in a bulb circuit because, if there is enough power (voltage times current), the bulb will illuminate. If there is current, but not enough power to illuminate the bulb, you will need to measure the current with an ammeter to see if there is any current.
What does it mean to source current?
the source current is the current that flows from the power source.
What is the relationship between motor speed and power factor?
Power factor is the ratio of apparent versus true power. It depends on the phase angle between voltage and current, and is the cosine of that phase angle. This occurs because a motor is an inductive (reactive) load, constituting a stored energy device. In an inductor, current lags voltage. In a capacitor, current leads voltage.
What kind of relationship can be concluded about the voltage difference across a resistor and the current flowing through it?
POWER=VI. V=voltage I= current
What is the relationship between current and power?
P=I^2*R where P=power I=Current R=Resistance
What does the power vs current graph reveal about the relationship between power consumption and current flow in the electrical system?
The power vs current graph shows that power consumption increases as current flow increases in an electrical system. This indicates a direct relationship between power consumption and current flow, where higher current flow results in higher power consumption.
What is the relationship between power, current, and voltage in an electrical circuit?
In an electrical circuit, power is the product of current (the flow of electric charge) and voltage (the force that drives the current). The relationship between power, current, and voltage is described by the equation P I x V, where P is power, I is current, and V is voltage. This equation shows that power increases when either current or voltage increases in a circuit.
What is the relationship between power, voltage, and current, and how can it be expressed mathematically using the formula power equals voltage multiplied by current?
The relationship between power, voltage, and current can be expressed mathematically using the formula: Power Voltage x Current. This formula shows that power is directly proportional to both voltage and current. In other words, an increase in either voltage or current will result in an increase in power.
Realation of current with power and time?
There is no direct relation of electric current and power. In order to knowhow much power (or energy) the current gives up, you must know what thecurrent is flowing through.The easiest way to describe anything through which the current is flowing isto measure and state its electrical resistance.Once you know the resistance through which the current is flowing . . .Power delivered by the current = (magnitude of the current, amperes)2 x (resistance of the path, ohms)The power is delivered continuously. Its unit is watts.Each watt of power means 1 joule of energy every second.
What is the relationship between power (P), current (i), and resistance (r) in an electrical circuit?
The relationship between power (P), current (i), and resistance (r) in an electrical circuit is described by the formula P i2 r. This means that power is directly proportional to the square of the current and the resistance in the circuit.
What is the Mathematical relationship between electrical power and the number of coils of wire?
There is none. There is a relationship between voltage and current and turns ratios in a transformer. But this rule remains - power in = power out. You don't get anything for free.
How does ohms law apply to a hair dryer?
Ohm's Law can be applied to a hair dryer to determine the relationship between the voltage supply, current flowing through the device, and its resistance. By knowing the voltage of the power source and the resistance of the hair dryer (typically indicated on the device), you can calculate the current flowing through the hair dryer using the formula I = V/R, where I is the current, V is the voltage, and R is the resistance.
What is the relationship between power dissipation (P), current (i), and resistance (r) in an electrical circuit, as represented by the equation Pi2r?
The relationship between power dissipation (P), current (i), and resistance (r) in an electrical circuit is represented by the equation Pi2r. This equation shows that power dissipation is directly proportional to the square of the current and the resistance in the circuit.
What is the relationship between voltage power and current?
The unit of power is watts, the unit of current is amps, and the unit of voltage it volts. Power = Voltage X Current Voltage = Power / Current Current = Power / Voltage In electricity, power is symbolized with a P, current with an I, and voltage with a V. The real formula looks like: P = V x I V = P / I I = P / V
How do you know when electric current is flowing in a light bulb circuit?
You know if current is flowing in a bulb circuit because, if there is enough power (voltage times current), the bulb will illuminate. If there is current, but not enough power to illuminate the bulb, you will need to measure the current with an ammeter to see if there is any current.
