- #1
Shinwasha
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Homework Statement
When a nonideal battery is connected to a 3.0-Ω resistor in a circuit, the current in the circuit is 2.0A . When the same battery is connected to a 1.0-Ω resistor in a circuit, the current in the circuit is 3.0 A.
What is the internal resistance of the battery?
What is the emf of the battery?
Homework Equations
I=ε/(Rbattery+R)
I=ε/R
The Attempt at a Solution
I've looked at this to solve the emf for each individual situation, which gives me for the first scenario
2.0=ε/3.0 ε=6.0
2nd scenario
3.0=ε/1.0 ε=3.0
I realized that plugging this in wouldn't work because this requires me to have two different EMFs when it only wants one.
However using it I get for first scenario
2.0=6.0/(rbattery + 3.0), = rbattery + 3.0 = 3.0, = r battery = 0
second scenario
3.0 = 3.0 /(rbattery + 1.0), = r battery + 1 = 1, = r battery = 0
Considering the equation has to unknowns that I need to find out figuring out how to nail one of the variables down would help solve this.