Register & enjoy the perks of a Universal College Application, Easy Process, Time-saving, and Free Contact details and Brochures.
Monthly Users
Monthly Applications
Admissions
No Result Found
Updated on 04th May, 2023 , 7 min read
Ohm's law is a fundamental principle of electrical engineering that provides a mathematical relationship between current, voltage, and resistance in an electrical circuit. This law has been widely used and accepted as a basic tool for understanding and analyzing electrical systems for over a century. Although it is widely used in electrical engineering, there are certain limitations to Ohm's law that must be considered. Read the article till the end to learn about these limitations of Ohm's law.
Ohm's law is a fundamental principle of electrical engineering that describes the relationship between electric current, voltage, and resistance in a circuit. It is named after the German physicist Georg Simon Ohm, who first formulated the law in 1827.
Ohm's law states that the current (I) flowing through a conductor between two points is directly proportional to the voltage (V) across the two points and inversely proportional to the resistance (R) between them. The mathematical expression for Ohm's law is given by:
V = IR, where V is the voltage, I is the current, and R is the resistance(V ∝I)
Or, it can be represented as follows:
I = V/R or V = R*I
This relationship can also be represented graphically as a straight line on a voltage-current graph.
The limitations of Ohm's law are very important to learn as it helps the engineers and technicians to avoid common mistakes and ensure that their calculations and models are accurate. This is particularly important in the design and analysis of electrical systems, where even small errors can have significant consequences.
The most important limitations of Ohm's law are as follows:
The limitations of Ohm's law are useful in improving the accuracy, understanding, and design of electrical systems. Recognizing and understanding these limitations can help electrical engineers and technicians make informed decisions and achieve better results in their work.
The limitations of Ohm's law are useful in several ways:
Ohm's law may be used to calculate a circuit's resistance, current, and voltage applied to the circuit. We may determine the values of additional parameters, such as resistivity and many more, using the three values mentioned above. Ohm's Law's practical uses include:
Ohm's Law states that the current flowing through a conductor between two points is directly proportional to the voltage across the two points and inversely proportional to the resistance of the conductor. The three components of Ohm's Law are:
These three components are related by Ohm's Law, which states that the current flowing through a conductor between two points is equal to the voltage across the two points divided by the resistance of the conductor (I = V/R).
It is the constant ratio that gives the unknown values of resistance. For a wire of uniform cross-section, the resistance depends on the length l and the area of the cross-section A. It also depends on the temperature of the conductor. At a given temperature the resistance,
R = ρlA
where ρ denotes the specific resistance or resistivity and is characteristic of the material of the wire. Using the last equation,
V = I × R = IρlA
I/A is the current density and is denoted by j. The SI unit of current density is A/m². So,
E I = j ρ I
This can be written as E = j ρ or j = σ E, where σ is 1/ρ is conductivity.
Was this Article Helpful/Relevant or did you get what you were looking for ?
👍 1,234
👎234
D Pharmacy: Admission 2024, Subjects, Colleges, Eligibility, Fees, Jobs, Salary
By - Nikita Parmar 2023-11-04 08:11:48 , 7 min readHow to Become a Pilot after 12th: In India, Courses, Exams, Fees, Salary 2023
By - Nikita Parmar 2023-08-25 09:48:44 , 11 min readOhm’s law does not apply to unilateral electrical components such as diodes and transistors since they only allow current to flow in one direction. For non-linear electrical components having properties such as capacitance, resistance, and so on.
When the conductor’s temperature is constant, Ohm’s law applies. The temperature influences the resistivity. The relationship between voltage and current is influenced by the voltage’s sign.
Ohm’s law formula is written as; V ∝ I. Therefore, V = RI where R is a constant called resistance. R depends on the dimensions of the conductor and also on the material of the conductor. Its SI unit is Ohm (Ω).
Ohm’s law was discovered by the German physicist Georg Simon Ohm in 1827.
Ohm’s law states that the current flowing 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, Ohm’s law is represented as V = IR, where V is voltage (in volts), I is current (in amperes), and R is resistance (in ohms).
Ohm’s law states that the voltage across a conductor is directly proportional to the current flowing through it, and inversely proportional to the resistance of the conductor. In other words, the higher the voltage, the greater the current, and the higher the resistance, the lower the current.
communication@collegesearch.in
+91 84482 99862 
Download Brochure
