Ohm's Law - Relation among Voltage, Current and Resistance

 Ohm's law describes the relationship between voltage, current, and resistance in an electrical circuit. It states that the current through a conductor between two points is directly proportional to the voltage across the two points and inversely proportional to the resistance between them.  

Mathematically, 

V = I * R             where V is voltage, I is current, and R is resistance.  

 

• Voltage (V): The electrical potential difference between two points in a circuit, measured in volts.  
• Current (I): The flow of electrical charge through a conductor, measured in amperes (amps).  

• Resistance (R): The opposition to the flow of current, measured in ohms.  

More about Ohm's law: 

• If you increase the voltage (push) in a circuit, the current (flow) will increase proportionally, assuming the resistance stays the same.  
• If you increase the resistance in a circuit, the current will decrease, assuming the voltage stays the same.  

Applications: 

Ohm's law is a fundamental concept in electrical engineering and is used in various applications, including:  

• Calculating voltage, current, or resistance in a circuit when two of the values are known. 
• Designing and analyzing electrical and electronic circuits. 
• Troubleshooting electrical problems. 
• Understanding the behavior of electrical components like resistors.  

Important Note: Ohm's law applies to materials that are considered "ohmic," meaning their resistance remains constant regardless of the voltage or current applied, as long as physical conditions and temperature remain constant.