What is the formula of ampere?

Answer 1

The formula for amperage is:

I = V / R

I = amperage, V = voltage, and R = resistance.

Also amperage can be found by using the following formulas.

I = P / V, Amps = Watts/Volts

I = sq root P/R, Amps = the square root of (power divided by resistance) watts/ohms.

Answer 2

There are a great many formulae for calculating current, but they all depend upon what other quantities are given to start with! Your question should be asking, "What is the formula for current, given the following quantities...?"

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The three popular formula for calculating amperage are I = E/R, I = W/E and I = the square root of W/R. Where I = amps, E = volts, R = resistance and W = watts.

Answer 3

An ampere is coulombs per second.

It is also voltage times resistance. (Ohm's law)

Answer

There is no 'formula' for an ampere. An ampere is defined in terms of the force between two, parallel, current-carrying conductors. This is a definition, not a formula.

Answer 4

Not sure what you are talking about. Some formulae that involve current are (SI units in parentheses):

current = charge / time (amperes = coulombs / second)

Ohm's Law: voltage = current x resistance (volts = amperes x ohms)

Power dissipation: power = current squared x resistance (watts = amperes squared x ohms)

Answer

There is no 'formula' for an ampere. An ampere is defined in terms of the force between two, parallel, current carrying conductors. This is a definition, not a formula.

Answer 5

It really depends on what information you already have. For example, if you know the voltage of the supply and the resistance of the load, then you could divide that voltage by the resistance. If you know the voltage of the supply and the power of the load, then you could divide the power by the voltage. If you know the power and the resistance of the load, then you could find the square root of the power divided by resistance. The list is endless.... well, not quite, but it's a fairly long list!!

Answer 6

Amperes are used to measure current. To find a measure of amperes in a system, simply divide the power in Watts in use by the voltage difference across the circuit.

Answer 7

Amps = Volts divided by resistance in ohms.

Answer 8

Watts divided by volts gives a rough measure of amperes.