Relation of power to voltage

[Marinaelectricalco]

The voltage applied to the resistor dramatically affects the power consumed by that resisitor becuase power is affected in direct proportion to the voltage.

This statement is false per exam prep book. What is the correct statement.

 

[__dan]

P = V^2 / R

So power is proportional to voltage squared.

 

[Jraef]

If you didn't catch that, the difference is the word "direct", which in math terms means x=y, not x=y squared.

 

[Carultch]

The voltage applied to the resistor dramatically affects the power consumed by that resisitor becuase power is affected in direct proportion to the voltage.

This statement is false per exam prep book. What is the correct statement.

If Y is directly proportional to x, that means y = k*x, where k is a constant value independent of y or x.


y = k*x + y0 is not a direct proportionality
y = k*x^2 is not a direct proportionality