Science Group
Question:
ankita93
Student
High School - 10th Grade
What is Ohm's law?
Answers:
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kjcdb8er Teacher
eNotes Editor
Posted by kjcdb8er on Thursday June 25, 2009 at 7:04 AMOhm's Law relates the electrical resistance of a conductor to the voltage across it and current passing through it.
The modern form of Ohm's law is V = IR, where V is voltage, I is current, and R is the resistance of the cunductor.
The law was named after the German physicist Georg Ohm who in 1827 made measurements of applied voltage and current through simple electrical circuits containing various lengths of wire.
The most common application of Ohm's law is to circuit elements known as resistors. However, the flow of electricity through many complicated objects or systems can be modled as if the electricity were flowing through simple circuit elements, like resistors. Thus Ohm's law finds wide application in electrical sciences.
Sources:
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krishna-agrawala Teacher
Graduate SchooleNotes Editor
Posted by krishna-agrawala on Thursday June 25, 2009 at 10:01 AMOhm's discovered by George Ohm in 1827 is a mathematical formula that describes relationship between electromotive force (E), current (I) and resistance (R) in an electric circuit.
As per this law:
E = IR
That is, Electromotive force (in volts), is equal to current (in amperes) multiplied by resistance (in ohms).
This law is applicable only to direct current (DC) circuits. However it can also be applied to AC circuits by replacing resistance bu impedance (Z).
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najiah Student
High School - 10th GradePosted by najiah on Friday June 26, 2009 at 3:41 AMTHE CURRENT FLOWING THOUGH A CONDUCTOR IS DIRECTLY PROPORTIONAL TO THE POTENTIAL DIFFERENCE APPLIED ACROSS ITS ENDS PROVIDED ITS TEMPERATURE IS CONSTANT.
V=I R
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Posted by burnham on Sunday August 30, 2009 at 7:40 AM
Ohm's lawState : That the current flowing in the circuit is directly proportional to the apply voltage and Inversely proportional to the resistance of the circuit
