Question

What are the three forms of Ohm's law?

Answer 1

Ohm's law:

• Ohm's law asserts that if all physical conditions and temperatures are constant, the voltage across a conductor is precisely proportional to the current flowing through it.
• Mathematically, this current-voltage relationship is written as,

$\mathrm{V}=\mathrm{I}.\mathrm{R}$

• In the equation, the constant of proportionality, $\mathrm{R}$, is called Resistance and has units of ohms, with the symbol $\mathrm{\Omega }$.
• The same formula can be rewritten in order to calculate the current and resistance respectively as follows:
• $\mathrm{I}=\frac{\mathrm{V}}{\mathrm{R}}$
• Another form of Ohm's law is:
• $\mathrm{R}=\frac{\mathrm{V}}{\mathrm{I}}$

Thus, these are the three forms of Ohm's law.