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What is the relationship between power and current flowing?
GeorgeUzunfb3123
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.
Wiki User
∙ 9y ago
Wiki User
∙ 9y agopower is the product of voltage and current
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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 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.
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 meant by wattless current?
Current flowing through an ac circuit in which power consumed is zero is called wattless current.
Do devices operate on power or current?
Electrical devices use power to operate, but power does not exist without current. Alternately, if current is flowing, power is being stored or used by some electrical device.
What is the difference between bidirectional energy meter and unidirectional energy meter?
A bidirectional meter will meter power flowing in, and power flowing out separately. Unidirectional meters usually measure power (so flowing in will be added to power flowing out). If you're selling power and using power, you need to know how much you are producing (power flowing out), and how much power you are consuming (power flowing in) for correct billing.
Describe the relation between the size of your source and electric current?
The current drawn from a power source is directly proportional to the voltage of thesource, and inversely proportional to the resistance of the circuit between its terminals.There is no relationship between the current and the physical size of the source.
How differential protection work in a transformer?
Power flowing into a transformer must match the power flowing out (minus losses which are minimal). If this is not the case, there's something wrong. Differential protection monitors current only; Current flowing into one side of the transformer will be equal to current flowing out the other side scaled by the turns ratio of the transformer. Since the turns ratio is equivalent to the voltage ratio, this is easily set.
