Finding Power in watt with a real battery

AI Thread Summary
To calculate the power dissipated by a 2.4-ohm resistor connected to a 1.5V battery with an internal resistance of 10 ohms, the correct approach involves using the formula P = I^2 * R. The current (I) can be determined using Ohm's law, I = V / (R_total), where R_total is the sum of the resistor and the battery's internal resistance. The user is struggling to find the correct answer despite knowing the relevant equations. A step-by-step calculation is requested to clarify the process. Understanding the total resistance in the circuit is crucial for accurate power dissipation calculations.
dmsgo89
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Homework Statement


calculate the power dissipated by a resistor R connected to the battery when R = 2.4 ohm.


Homework Equations


I=V/R


The Attempt at a Solution


I found A of battery that given and put R value given to find P, however I cannot get a right answer.

What did I wrong?

http://session.masteringphysics.com/problemAsset/1021126/12/jfk.Figure.23.P47.new.jpg

The images shows that the battery has 10 ohm and 1.5V.

It is due tonight and I am lost :( please help!
 
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oh and I know P=I*V=V^2/R=RI^2
 
Please show us exactly what you have calculated and why you calculated it.
 

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