Finding Power in watt with a real battery

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SUMMARY

The discussion focuses on calculating the power dissipated by a resistor (R) connected to a battery with a resistance of 10 ohms and a voltage of 1.5V. The user attempts to apply the formula P=I*V and the relationship I=V/R to find the power, but struggles to arrive at the correct answer. The correct approach involves calculating the current (I) using the given voltage and resistance, and then applying the power formulas accurately to determine the power dissipation across the resistor.

PREREQUISITES
  • Understanding of Ohm's Law (I=V/R)
  • Familiarity with power formulas (P=I*V, P=V^2/R, P=RI^2)
  • Basic knowledge of electrical circuits
  • Ability to perform calculations involving voltage, current, and resistance
NEXT STEPS
  • Learn how to apply Ohm's Law in various circuit configurations
  • Study the relationship between power, voltage, and resistance in electrical circuits
  • Explore practical applications of power calculations in real-world scenarios
  • Investigate common mistakes in electrical calculations and how to avoid them
USEFUL FOR

Students studying electrical engineering, physics enthusiasts, and anyone needing to understand power calculations in electrical circuits.

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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