Question

Which of the following statements does not represent ohm's law?


current / voltage = constant
voltage / current = constant
current = resistance x voltage
voltage = current x resistance

Answer 1

current /voltage =constant
current =resistance ×voltage

These two statements do not represent him's law.

Answer 2

Current = Resistance x Voltage does not represent ohm's law (option-c).

• According to ohm's law: Voltage (V)   ∝   Current (I)

• Removing proportionality sign by using a contsant R (which is called resistance) Ohm's law would be written as-  

•                              Voltage = current x resistance

•                               V = IR

•        here, R ( Resistance) is the proportionality constant

      Ohm's law can also be written as-

                               Voltage / current = constant ( Resistance)

                               V / I = R  

      or,                  Current / Voltage = constant ( Resistance)

                              I / V = R

     or,                   Current = Voltage/ Resistance

                              I = V/ R

    But, I = R x V is impossible, hence it can not represent Ohm's law.