Question

V=IR to which law this formula applies

Answer 1

The Given Formula is the Mathematical Relation of the Ohm's law.

According to the Ohm,'s law, the current flowing in a conductor is directly proportional to the potential difference applied across its conductor provided that the Physical conditions such as temperature, Remains the constant.

Therefore,

V α I

⇒ V = IR

where, R is the constant and is known as the Resistance.

If we want the Ohm's law in Vector Equation, then it may be written as,

J = σ E

where, J = current density

and  σ = conductivity &

Also, V = l × E

Hope it helps.