Question

what is ohm's law ? Explain how it is used to define the unit of resistance​

Answer 1

Answer:

Explanation:

According to Ohm's Law,

The flow of current is directly proportional to the potential difference applied at its ends provided that temperature and physical conditions are constant.

So V is directly proportional to I

or V = IR

Where R is constant of proportionality, which is called resistance.

Unit of V is Volt(V) and that of Current is Ampere(A).

Hence from relation V = IR,

R = V/I

So unit of R is V/A, which is called Ohm.

Thanks!

Answer 2

Answer:

this law that when a current carrying conducter is directly propostional to the potential different across the conductor

EXPLAIN.....

V/I = constant

this constant is called the resistance of the circuit and it is represented by symbol R,

V/I=R

V=IR

R is a constant for the given metallic wire at a given temperature and is called it's resistance

S.I. units of resistance is ohm............

according to ohm law R=V/I