What is Ohm's Law? Give experimental verification of Ohm's Law.

 

pls pls pls ans me urgently!!!

Ohm's law is one of the basic equations used in the analysis of electric currents. It applies to both metal conductors and circuit components (resistors) specifically made for this behaviour. Both are ubiquitous in electrical engineering. Materials and components that obey Ohm's law are described as "ohmic".

n where is the experiment???

This law can be easily verified by a simple experiment. A length of nichrome resistance wire (or a known value resistor) is connected to a variable DC voltage source through an ammeter. A voltmeter is connected across the resistance wire.

The variable voltage source can be constructed using a potentiometer and a DC power supply.

The variable arm of the POT tap is adjusted to give fixed incremental changes in voltage over a determined voltage range. For each increment the voltmeter and ammeter readings are taken. The readings may be interpreted graphically to determine the resistance value

what about this ?

The potential difference V across the ends of a given metallic wire in an electric current is directly propotional to the current flowing through it, provided it temperature remains the same. this is called ohm's law .

                    V  derictly proportion to I

                            V/I = constNT (R)

                                  V =IR

thank you sir! :)