What does negligible resistance mean?

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SUMMARY

Negligible resistance indicates that a battery functions as an ideal source of direct current (DC) voltage, maintaining a constant voltage at its terminals irrespective of the current drawn. In the context of the homework question, the answer to the problem is confirmed to be 4J, not 6J. This distinction is crucial for understanding the behavior of electrical circuits involving ideal voltage sources.

PREREQUISITES
  • Understanding of basic electrical concepts, specifically Ohm's Law.
  • Familiarity with the principles of direct current (DC) voltage sources.
  • Knowledge of power calculations in electrical circuits, specifically the formula P=IV.
  • Basic problem-solving skills in physics or electrical engineering.
NEXT STEPS
  • Study the characteristics of ideal voltage sources in electrical engineering.
  • Learn about the implications of negligible resistance in circuit analysis.
  • Explore the relationship between voltage, current, and power in DC circuits.
  • Review common problems involving power calculations using the formula P=IV.
USEFUL FOR

Students in physics or electrical engineering, educators teaching circuit theory, and anyone interested in understanding the principles of ideal voltage sources and their applications in electrical circuits.

ellieee
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Homework Statement
nil
Relevant Equations
P=IV
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why is answer for (6a)6J?
 
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ellieee said:
Homework Statement:: nil
Relevant Equations:: P=IV

View attachment 286996
why is answer for (6a)6J?
Negligible resistance means that the battery is a perfect source of DC voltage. The voltage at it's terminals is constant regardless of the current drawn.

The answer is not 6J.
 
DaveE said:
Negligible resistance means that the battery is a perfect source of DC voltage. The voltage at it's terminals is constant regardless of the current drawn.

The answer is not 6J.
then is the answer 4J?
 
ellieee said:
then is the answer 4J?
Yes.
 

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