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Ohm
Defined as the resistance of a conductor through which a current of one ampere is flowing when the potential difference across it is one volt.
Ohm's law:
where
V
= potential difference across
R
I
= current through
R
[A]
R
= resistance [ohm]
Field form of Ohm's law:
where
J
= current density
σ
= conductivity
E
= electric field
The power disipated by a resistor is given by Joule′s law:
where
W
= power disipated [Watt]
I
= current [Ampere]
R
= resistance [Ohm]
V
= potential difference across resistor [Volt]
Enter two values and the other values will be calculated.
See also:
Abohm
,
Ohmmeter
,
Resistance
,
Statohm
.
Science & Engineering Encyclopaedia Version 2.3 © 2001-2008
Dirac Delta Consultants Limited
