Ohm's Law

relationship between current and electrical resistance

ohm resistenza simbolo omega

Among the strength ( R ) of the current ( I ) and the tension ( V ) there is a simple relationship:

  
  

Resistance (R) x Current (I) = Volatage (V)

  

Since knowing two of these magnitudes we can simply get the third one.

I = V / R or inversely R = V / I

Also electric power ( P ) can be calculated as:

P = V x I or P = R x I x I

or by concluding the expression:

P = R x I ²

That is, the resistance is directly proportional to the power and square of the current.

joule electric resistance effect

Joule Effect

When an electric current circuit creates a resistance to current passage, it results in an increase in its temperature.

This property is exploited to create resistors used in various electrical equipment to heat up.

An example of these applications are ironing irons, ovens, heat fans, phoners, etc ..

Electrician

Overload

Electrician

Neutral cable and phase cable

Electrician

Alternating current and appliances

Electrician

A voltage generator

Electrician

The phase and the electrical power

Portaombrelli design Luca Perlini

PurplePrice

Portaombrelli design Luca Perlini

Attaccapanni equilibrio design Luca Perlini

PurplePrice

Attaccapanni equilibrio design Luca Perlini

Letto baldacchino design Luca Perlini

PurplePrice

Letto baldacchino design Luca Perlini

Tavolo cave design Luca Perlini

PurplePrice

Tavolo cave design Luca Perlini

Attaccapanni Bitta set design Luca Perlini

PurplePrice

Attaccapanni Bitta design Luca Perlini

Attaccapanni Bitta set design Luca Perlini

PurplePrice

Poltrona Ozio design Luca Perlini

hometrustworld
Portaombrelli design Luca Perlini

Share your experence