_{what is the necessary condition for a conductor to obey ohms law?}

Hi,

me1tsush has given absolutely correct answer. So, you can refer to it.

 

Temperature and physical conditions should remain same for a conductor to obey ohms law.

 

For example: A 100-watt, 120-volt lamp has a resistance of 144 ohms when lit, but the cold resistance is much lower (about 9.5 ohms).

 

Hope this helps,

@me1tsush. Good answer. You get a thumb up. Keep posting!!