Electric Potential Drop Across A Resistor

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SUMMARY

The discussion centers on the electric potential drop across a resistor in a resistive circuit element. As electric charge moves through the resistor, its potential energy decreases, converting to kinetic energy and heat due to collisions. The relationship between electric potential and electric field indicates that a decrease in electric potential results in a weaker electric field within the resistor. This phenomenon is observed in various resistive elements, including power lines and circuit boards, where resistance leads to energy loss primarily as heat.

PREREQUISITES
  • Understanding of electric potential and potential energy
  • Knowledge of electric fields and their relationship to voltage
  • Familiarity with resistive circuit elements and their properties
  • Basic principles of direct current (DC) systems
NEXT STEPS
  • Explore the relationship between electric potential and electric field strength
  • Investigate the behavior of resistive materials at different temperatures
  • Learn about measuring voltage drops across resistors in DC circuits
  • Study the implications of electric field strength in high voltage applications
USEFUL FOR

Electrical engineers, physics students, and anyone interested in understanding the behavior of electric circuits and the principles of electric potential and fields.

Bashyboy
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Hello,

As a charge traverses through a resistive circuit element it will have a certain amount of potential energy before entering the circuit element; and as it passes through, it's potential energy will decrease (due to it converting to kinetic energy, and collisions)--this I iunderstand. Since there is a relationship between electric potential and potential energy, we can use it to see that electric potential decreases--this I also understand. What I am curious about is, what is happening to the electric field in this circuit element? I know that there is a relationship between electric potential and the electric field, which has scalar values of electric potential assigned to points in the field. So, what's happening to the "anatomy" of the electric field in a resistive circuit element?
 
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Actually at everyday conditions a "resistive circuit element" is pretty much everything from the power station through the wires /local transformers your ac mains cables to your circuit board and so on. And that is just because that at room or normal outside temperatures metals even copper and silver and gold show a electrical resistance.Ones have bigger the others smaller but they have one.So the charge is constantly loosing it's power , but ofcourse that is minimal compared to a resistor which is specifically designed to loose it.converting it to heat.

Well to my best understanding the electric field strength is proportional to the electric potential of a charge at given point or voltage at that point.
So when current passes through a resistor it looses some of that potential hence the field should get weaker.
I think it is logical for a lower electric potential to have a lower electric field.That's why you have a large safety and no living zone around high voltage power lines, because the electromagnetic (electric) (magnetic) fields are strong.

In a dc system theoretically you should see the potential drop across the resistor measuring at parts of the resistor if it would be a wire wound open type one or so.

http://hyperphysics.phy-astr.gsu.edu/hbase/electric/efromv.html

http://en.wikipedia.org/wiki/Electric_potential

these might help
 

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