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Only those with a weak understanding of electricity believe that the equation, I = E/R, is derived from Ohm's Law. In fact the equation is derived from the definition of the ohm, and not from Ohm's Law! Those who believe that this equation comes from Ohm's Law are demonstrating a fundamental misunderstanding of that so-called 'law'.

Ohm's Law essentially states that 'the ratio of voltage to current is constant for variations in voltage'. No mention of the ohm, and no mention of an equation! If you were to plot a graph of current against voltage for different values of voltage, you will find that very few conductors or other electrical devices produce a straight-line graph; the overwhelming majority produce a curve. So 'linear' or 'ohmic' conductors obey Ohm's Law, whereas 'non-linear' or 'non-ohmic' conductors and devices do NOT! An incandescent lamp, for example, does NOT obey Ohm's Law because its resistance constantly changes as the voltage applied across it changes.

However, the equation R = V/I, which is derived from the definition of the ohm, applies to any circuit for any specified value of voltage, whether that circuit obeys Ohm's Law or not.

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10y ago
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14y ago

Current is equal to the voltage difference of a circuit divided by it's resistance, because that is how resistance is defined.

Current is coulombs per second. Voltage is joules per coulomb. Ohm's law says that resistances is voltage divided by current. Expand that and you get joule-seconds per coulomb squared. This combined unit was named ohms (Omega, Ω) after Georg Simon Ohm, who did most of the experimental and theoretical work on resistivity.

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12y ago

Because that is what Ohm's law states as to the definition of resistance. Resistance is electric potential divided by current; therefore, current is electric potential divided by resistance.

Rather than asking why, why don't you concentrate on memorizing this, because it is a fundamental construct in how we analyze electricity. If you really want to know why, you need to ask Georg Ohm, and he is dead. Actually, you don't have to - his principle lives on - we accept it as as law, and it forms one of the cornerstones in the rules of electricity. Now, go and memorize it.

Electric potential = current times resistance. (That's the third flavor of the same law.)

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10y ago

Voltage divided by current is resistance.

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While the ratio of voltage to current is indeed resistance, you should be aware that this is obtained from the definition of the ohm, and not from Ohm's Law.

This equation is true whether a circuit or other electrical device follows Ohm's Law or not (and most do not!).

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11y ago

The definition of the ohm, and not Ohm's Law, tells us that resistance is voltage divided by current.

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13y ago

No. Ohm's Law says R = V/I or Voltage/Current.

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13y ago

Ohm's Law

Voltage = Current x Resistance

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11y ago

Yes, unless one were to delve into the dynamics of complex power.

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15y ago

This statement is correct.

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Q: What does current divided by resistance equal?
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Related questions

Voltage muiltiplied by resistance measures to current?

No. Voltage divided by resistance is equal to current.


The statement that current is equal to the vottage difference divided by the resistance is?

Ohm's law.


The statement that current is equal to the voltage difference divided bythe resistance in known as?

Ohm's Law V = I R Voltage = Current x Resistance


What is the statement current is equal to the the voltage difference divided by the resistance know as?

Ohm's law.


Who says that the resistance is equal to the voltage divided by the current?

German physict Georg Ohm


What happens to the current in a device if the resistance of the device increases and the voltage difference stays the same?

If resistance increases and voltage stays the same, then current decreases. Ohm's Law: Current equals Voltage divided by Resistance.


What happen to the current when the voltage is greater than or equal to 6 volts?

The current is greater than or equal to (6) divided by (the effective resistance of the circuit).


What does power divided by speed equal?

Ohm so correctly said: Voltage divided by current equals resistance. Voltage divided by current will tell you the value of a circuit's resistance. But resistance is not affected by either voltage or current. It is determined by the length, cross-sectional area, and resistivity (type of conducting material) of the conductor. Resistivity is, in turn, affected by temperature. So voltage divided by current tells you what the resistance happens to be - changes in voltage or current do not affect resistance.


The statement, current is equal to the voltage difference divided by the resistance, is known as?

Ohm's Law. It is usually written as V = I x R or in words Voltage is equal to Current times Resistance; or in your terms I = V / R.


Does voltage divided by watts equal the current?

Electric power is not defined as current divided by voltage. Electric power (Watts) is equal to amps times voltage


How do resistance behave in parallel circuit?

in a parallel circuit resistance decreases increasing the current.


Is current the voltage multiplied by resistance?

No. V =Voltage, I =current, and R =resistancein the simple equation: V=I*R. As well, V/I=R, and. V/R=Iso Current is voltage divided by resistance