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24 Aug 2009 09:30:59 IST

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limitations of ohm,s law

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limitations of ohm,s law

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anuj

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24 Aug 2009 10:03:27 IST

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Ohm's law is not a fundamental law of nature. There are a number of commonly used circuit elements which do not obey this law.

Tushar Sharma

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24 Aug 2009 10:57:17 IST

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limitations of ohms law can be simply stated.......... As according to ohms law V is directly proportional to I but many devices like diodes and semiconductors etc doesn't follow it .....That's it

ratnesh mishra

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24 Aug 2009 11:18:36 IST

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ohm's law is V is directly proportional to I this law fails when:

1) V ceases to be proportional to I

2) The relation between V and I depends on the sign of V. In

other words, if I is the current for a certain V, then reversing

the direction of V keeping its magnitude fixed, does not

produce a current of the same magnitude as I in the opposite direction. Eg- diode

3) The relation between V and I is not unique, i.e., there is more than one value of V for the same current I. A material exhibiting such material is GaAs

For more in depths look at page no.101 NCERT Physics Part-1

Sagar Saxena

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24 Aug 2009 12:33:54 IST

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hello dear

the limitation os ohms law is::

1.Ohm's law does not work in case of non ohmic conductors like diodes,electrolytes,filaments

2.it doesnt hold at extreme temperatures

3.V is proportional to I provided temperature remains constant...

Saka Nasirudeen

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2 Feb 2012 21:50:36 IST

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Ohms law can be verified by using volt meter ammeter

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