Hi everyone again. These problems are tough... I need help... íNecesito Ayuda! ;)
In electrical theory, Ohm's law states that , where is the current in amperes, is the electromotive force in volts, and is the resistance in Ohms.
In a certain circuit V = 110 and R = 50. If V and R are to be changed by the same numerical amount, what change in them will cause to double?
First I thought it would be imperative to find the new doubled amount.
So currently we have:
Double that would be
I don't see how to make an equation to increase both the V and R by a constant number. Please help and thanks everyone.
Thanks, shouldn't I plug V = 110 and R = 50 in that final equation you got?
It's better practice to solve for x in terms of V and R, but if that's the way you want to do it, go for it! :)
Originally Posted by Jonboy
For reference I get
Edit: Oh dear. That makes x negative. Either my setup is wrong or there is no solution.
Edit Mark II: No, a negative x is okay because the questions says that we change V and R by the same amount, not add. :)