Question

Deduce ohms law from elementary concepts.

Answer 1

Ohm's law states that “the current through a conductor between two points is directly proportional to the voltage across the two points. Introducing the constant of proportionality, the resistance.”

The mathematical formula is : I=V/R' (as I'm not able to paste this formula, the explanation is given below.

The explanation is : “The resistor's current I in amps (A) is equal to the resistor's voltage V in volts (V) divided by the resistance R in ohms (Ω): V is the voltage drop of the resistor, measured in Volts (V).”

Example, if we have “a circuit with the potential of 1 volt, a current of 1 amp, and resistance of 1 ohm.”  “The amount of water in the tank is defined as 1 volt and the “narrowness” (resistance to flow) of the hose is defined as 1 ohm."

Answer 2

Ohm's law states that any voltage across a conductor depends on the current and resistance existing in the conductor.

If the resistance is really high (to infinity for instance), then voltage is unable to travel across a conductor because the current becomes negligible.