Internal resistance = Ext resistance so 2r=R
But wont P max be 2E^2 ÷R instead of E^2÷R
I am getting Pmax=(2E)^2÷(R+2r)
And 2r =R and so Pmax as 2E^2÷R
Mohd sabir Shaikh last edited by
Pmax, which you have written is across the battery.......for across any resistor, Power is i^2R, where i is the current flowing through that resistor.
Anurag Katkar last edited by
Check potential drop across R
It's E not 2E that's why.
Ashish Singh last edited by
You can find the max by am≥gm inequality if you don't know how to find maxima or minima of a function
"Maximum power is dissipation takes accros the resistance when its value is equal to rest Equivalent resistance of the circuit..."