# P = V * ( V / R ) = V2 / R

#### mbrooke

##### Batteries Not Included
Is P = V * ( V / R ) the same as V2 / R ? Why? And if not which is correct? .....................................

#### m sleem

##### Senior Member
Yes, they are same.

#### GoldDigger

##### Moderator
Staff member
The only problem is that on this Forum it is not possible to render subscripts and superscripts. Hence the very ambiguous V2 to represent V squared (V * V).
Other notation conventions are V^2 and V**2 for V squared. Some places even use Vexp2.

#### Dennis Alwon

##### Moderator
Staff member
V² -- It can be done

Hold down "alt" and type 0178

##### Senior Member
V² -- It can be done

Hold down "alt" and type 0178
Very kludgey. The old site allowed super- and subscripts directly.

#### Dennis Alwon

##### Moderator
Staff member
There are many alt codes you can use

"alt" 0176 is degrees 180°

#### Dennis Alwon

##### Moderator
Staff member
windows character map also has lots

½
Ø

#### Dennis Alwon

##### Moderator
Staff member
I will ask to see if we can get subscipt & superscript added

#### Besoeker3

##### Senior Member

I will ask to see if we can get subscipt & superscript added
That would be handy..................

#### mbrooke

##### Batteries Not Included
The only problem is that on this Forum it is not possible to render subscripts and superscripts. Hence the very ambiguous V2 to represent V squared (V * V).
Other notation conventions are V^2 and V**2 for V squared. Some places even use Vexp2.
Yes, V*V or square. I should have mentioned that, my mistake

#### mbrooke

##### Batteries Not Included
I will ask to see if we can get subscipt & superscript added

Thanks, that would be great!

#### mbrooke

##### Batteries Not Included
Yes, they are same.
In mathematical terms, why does it work out?

I also tried to simplify P = V * ( V / R ) and got V*V/R*R but thats obviously not right.

#### oldsparky52

##### Senior Member
In mathematical terms, why does it work out?

I also tried to simplify P = V * ( V / R ) and got V*V/R*R but thats obviously not right.
Would it help to look at it like (V/1)*(V/R) ?

Multiply the numerators is V*V or V-squared.
Multiply the denominators is 1*R or R

#### LarryFine

##### Master Electrician Electric Contractor Richmond VA
In mathematical terms, why does it work out?
Make up some numbers for V and R and do the math each way.

#### synchro

##### Senior Member
There are many alt codes you can use

"alt" 0176 is degrees 180°
The alt codes Dennis mentioned are known as Unicode characters:

You can also search in Google using the words "Unicode" and a word describing the symbol for which you want the alt code, such as "degree".

#### mbrooke

##### Batteries Not Included
Would it help to look at it like (V/1)*(V/R) ?

Multiply the numerators is V*V or V-squared.
Multiply the denominators is 1*R or R
Kind of. I always assumed that you multiply both numbers in the brackets by the one outside the brackets.

#### mbrooke

##### Batteries Not Included
Make up some numbers for V and R and do the math each way.

Certainly some law must govern this?

#### Speedskater

##### Senior Member
V² -- It can be done
Hold down "alt" and type 0178
This might work only on old-fashioned keyboards with number pads.