Very simple question law of ohm

Thread starter n124122
Start date Apr 30, 2016
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Law Ohm

In summary, the law of Ohm is a fundamental principle in electrical engineering that describes the relationship between voltage, current, and resistance in an electrical circuit. It was discovered by German physicist Georg Ohm in 1827 and is expressed mathematically as V = IR. Ohm's law is a general principle, while the law of Ohm is a specific application. The law of Ohm is used in everyday life for various applications, including household appliances, electronics, and power transmission, and is crucial in the design and maintenance of electrical systems.

Apr 30, 2016

n124122

*U=voltage

Homework Equations

U=IR (V=IR)

The Attempt at a Solution

200mA=0,2A --> 0,2*50=10V...? So because it's parallel the source should be 10V too right?

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Apr 30, 2016

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Homework Helper

n124122 said:

*U=voltage

Homework Equations

U=IR (V=IR)

The Attempt at a Solution

200mA=0,2A --> 0,2*50=10V...? So because it's parallel the source should be 10V too right?

Right. :)

1. What is the law of Ohm?

The law of Ohm is a fundamental principle in electrical engineering that states 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.

2. Who discovered the law of Ohm?

The law of Ohm was discovered by German physicist Georg Ohm in 1827. His work on the law of electrical circuits was published in a book called "Die galvanische Kette, mathematisch bearbeitet" (The Galvanic Circuit Investigated Mathematically) in 1827.

3. How is the law of Ohm mathematically expressed?

The law of Ohm is expressed as V = IR, where V is voltage in volts, I is current in amperes, and R is resistance in ohms. This equation can also be rearranged to find the value of any of the three variables by dividing the other two. For example, to find resistance, the equation becomes R = V/I.

4. What is the difference between Ohm's law and the law of Ohm?

Ohm's law is a general principle that describes the relationship between voltage, current, and resistance in any electrical circuit. It states that the current through a conductor is directly proportional to the voltage and inversely proportional to the resistance. On the other hand, the law of Ohm is a specific application of Ohm's law that applies to simple electric circuits with a constant resistance.

5. How is the law of Ohm used in everyday life?

The law of Ohm is used in many everyday applications, such as household appliances, electronics, and power transmission. It is also essential in the design and maintenance of electrical systems, as it helps to calculate the necessary voltage, current, and resistance for a particular circuit. Without the law of Ohm, it would be challenging to understand and control the flow of electricity in our daily lives.