How long can a 1.5 V battery light a flashlight bulb drawing 0.6A?

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Homework Help Overview

The problem involves determining how long a 1.5 V battery can power a flashlight bulb that draws 0.6 A, given that the battery stores 4.3 kJ of energy. The context is within basic electrical circuits, specifically focusing on power calculations and energy consumption.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • The original poster attempts to understand how to relate voltage, current, and energy to find the time the battery can power the bulb. Some participants suggest using the power formula P = IV to aid in the calculations.

Discussion Status

The discussion is ongoing, with some guidance provided regarding the relationship between power, energy, and time. Participants are exploring the necessary equations and concepts without reaching a consensus on the complete solution yet.

Contextual Notes

The original poster mentions having limited resources for reference, which may affect their understanding of the problem. There is also a note about the requirement for the final answer to be in hours.

Sarliz
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Homework Statement



You'll have to forgive me... I've got some rather poor Physics books with which to consult, so this may seem rather simple. I think I understand the concepts but I don't think I have all of the information from my sources to answer this problem.

A 1.5 V battery stores 4.3 kJ of energy. How long can it light a flashlight bulb that draws 0.6A?

Units should be in hours, but I'm not sure what to do with only having equations V = IR and I = E/R (where E is epsilon, of course). I don't know what part of this factors into time!
 
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The electric power in a DC circuit is P =IV. Is that enough to get you going?
 
Kurdt said:
The electric power in a DC circuit is P =IV. Is that enough to get you going?

Guess it'll have to be. Thanks.
 
Sarliz said:
Guess it'll have to be. Thanks.

If you have more questions I'll be happy to clarify :smile:

The units of power are of course Joules/second. That is where the time comes into it.
 

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