contestada

Your friend says that according to Ohm’s law, high voltage produces high current. Then your friend asks, ""So how can power be transmitted at high voltage and low current in a power line?"" What is your illuminating response?

Respuesta :

Explanation:

According to Ohm's law the current is directly proportional to the voltage between two points and inversely proportional to the resistance.

Mathematically:

[tex]I\propto\frac{1}{R}[/tex]

[tex]I\propto V[/tex]

[tex]I=\frac{V}{R}[/tex]

where:

[tex]I=[/tex] current

[tex]V=[/tex] voltage

[tex]R=[/tex] resistance

here resistance is a constant and cannot be changed, so:

[tex]R=\frac{V}{I}[/tex] hence for this ratio to be constant the values of voltage and current adjust accordingly.

We have the expression for the power as:

[tex]P=I^2.R[/tex]

for a particular energy source the energy remains conserved.

[tex]P=V.I[/tex]

so, on increasing Voltage the current will reduce to compensate the energy conservation.

Otras preguntas