State and explain Ohm’s law.
Ohm’s law is one of the most basic and vital laws of the electric circuit. It was George Simon Ohm, a German physicist who first verified Ohm’s law experimentally. The relationship between the electric current and potential difference is stated by Ohm’s law. Ohm’s law can be stated and explained as:
Statement:
- According to Ohm’s law, there is a direct proportional relationship between the voltage across a conductor and the current flowing through it when all physical conditions and temperatures are constant.
- Mathematically, the relationship between voltage and current can be written as V = IR
- In this equation, V represents the voltage across the conductor, I represent the current flowing through the conductor, and R is the constant of proportionality which is called resistance provided by the conductor to the current’s flow and it has the units of ohms. The symbol for denoting the same is Ω.
Explanation:
- When explaining the statement of Ohm’s law, it implies that the current flowing through the conductor is directly proportional to the voltage loss through a resistor.
- In simple words, if the current flowing through the conductor doubles, then the voltage across the same conductor will also be doubled.
- And if the current flowing through the conductor is reduced by half, then the voltage across the same conductor will also be reduced by half.
- According to Ohm’s law, to make the current flow through the resistance, having a voltage across the same resistance is a must.
- It is Ohm’s law that showcases the relationship between voltage (V), current (I), and resistance (R) V = IR.