Question

The following equation expresses a relationship in terms of one variable. However, you are asked to rewrite the equation in terms of a different variable. P = I × I × R(or P = I2R) I = ?

Answer 1

`I=\pm\sqrt{(P)/(R)}`

Explanation:

Given : The following equation expresses a relationship in terms of one variable
`P=I* I* R` or
`P=I^2R`

To find : Rewrite the equation in terms of a different variable I ?

Solution :

Equation
`P=I^2R`

In terms of I,

Divide both side by R,

`(P)/(R)=(I^2R)/(R)`

`(P)/(R)=I^2`

Taking root both side,

`\pm\sqrt{(P)/(R)}=I`

Therefore,
`I=\pm\sqrt{(P)/(R)}`

Answer 2

we have been given an equation expressing a relationship in terms of one variable.

The equation is

`P = I*I*R`

or

`P=I^2R`

we have been asked to asked to rewrite the equation in terms of a different variable, I.

Divide both the sides by R we get

`image`