electrical power formula?

Answer 1

Electric power is defined as the amount of work done by an electric current in a unit time.

In resistive circuits, instantaneous electrical power is calculated using Joule's Law, which is named after the British physicist James Joule, who first showed that electrical and mechanical energy were interchangeable.
P=I.V
where,
P = power in watts
I = current in amperes
V = potential difference in volts
For example: 2 amperes × 12 volts = 24 watts.

Joule's law can be combined with Ohm's law to produce two more equations:
P=I^2*R
and
P=V^2/R
where,

R = resistance in ohms.
For example:

(2 amperes)^2 × 6 ohms = 24 watts
and

(12 volts)^2 / 6 ohms = 24 watts.

Answer 2

Electrical Power Formula

Answer 3

Electrical Power is measured in Watts.

Watts is simply Volts*Amps or as mentioned V*I

It should be noted that the dissipation of electrical power in a system comes from the impedance of this system and is proportional to I squared.

that is why Electricity is passed over long distances at high Voltage and low current to reduce this loss as much as possible.

Answer 4

I think it is power = energy x time
energy in joules and time in seconds, where power is measured in watts

also i think electricity in our houses are measured in kilowatt hours. so basically you have to multiply the power from the above equation by the amount of time the item is switched on.

eg. Say a 60Watt lightbulb on for an hr = 0.06kWHr

Answer 5

Electric Power Formulas

P = V I (1a)

P = R I2 (1b)

P = V2/ R (1c)

where

P = power (watts, W)

V = voltage (volts, V)

I = current (amperes, A)

R = resistance (ohms, Ω)

Answer 6

Common electrical units used in formulas and equations are:

1.Volt - unit of electrical potential or motive force - potential is required to send one ampere of current through one ohm of resistance
2.Ohm - unit of resistance - one ohm is the resistance offered to the passage of one ampere when impelled by one volt
3.Ampere - units of current - one ampere is the current which one volt can send through a resistance of one ohm
4.Watt - unit of electrical energy or power - one watt is the product of one ampere and one volt - one ampere of current flowing under the force of one volt gives one watt of energy
5.Volt Ampere - product of volts and amperes as shown by a voltmeter and ammeter - in direct current systems the volt ampere is the same as watts or the energy delivered - in alternating current systems - the volts and amperes may or may not be 100% synchronous - when synchronous the volt amperes equals the watts on a wattmeter - when not synchronous volt amperes exceed watts - reactive power
6.Kilovolt Ampere - one kilovolt ampere - KVA - is equal to 1,000 volt amperes
7.Power Factor - ratio of watts to volt amperes

.Electric Power Formulas

P = V I

P = R I2

P = V2/ R

where

P = power (watts, W)

V = voltage (volts, V)

I = current (amperes, A)

R = resistance (ohms, Ω)

.Electric Current Formulas

I = V / R

I = P / V

I = (P / R)1/2

.Electric Resistance Formulas

R = V / I

R = V2/ P

R = P / I2

.Electrical Potential Formulas - Ohms Law

Ohms law can be expressed as:

V = R I

V = P / I

V = (P R)1/2

Example - Ohm's law

A 12 volt battery supplies power to a resistance of 18 ohms.

I = (12 V) / (18 Ω)

= 0.67 (A)

https://www.electrikals.com/

Answer 7

In physics, power (symbol: P) is the rate at which work is performed. In the SI system of measurement, power is measured in watts (symbol: W).

There are a few formulas which you are looking for at this link below...

Answer 8

There are so many formulas.
To find out H.P
To find out voltage
To find out Amphs
To find out Hzs
To find out Power Consumtion
To get Load Factor
To get Power Factor and many more.
Pl get the Pocket dairy of GE electricals.It has all the formulas.
You can E-Mail tsnsharma @yahoo.com and ask what exactly
the formula you need.

Answer 9

Watts. For low voltage applications which includes properties, it rather is calculated as VA (volts x amps). for 3-section electric applications (frequently 230v and up), it rather is calculated as VA/a million.732 or volts x amps divided by sq. root of three.

Answer 10

Power = ^ 3 xV x I x cos o. where Vis line voltage, I is line current and cos o is the power factor.