Some Questions pestering me , Help

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SUMMARY

This discussion addresses fundamental concepts in electrical engineering, specifically focusing on negative current, parallel circuits with resistance and capacitance, and the definition of voltage. Negative current indicates the flow of current in the opposite direction, which is essential for understanding alternating current (AC) behavior. In a parallel circuit with a DC battery, current initially flows through both arms, but once the capacitor charges, the flow to the resistance-capacitance arm ceases. Voltage is likened to pressure in a water flow analogy, where higher voltage increases current through resistive components.

PREREQUISITES
  • Basic understanding of alternating current (AC) and direct current (DC) concepts
  • Familiarity with circuit components such as resistors and capacitors
  • Knowledge of electrical potential and voltage definitions
  • Understanding of current flow direction and its implications
NEXT STEPS
  • Research the principles of alternating current (AC) and its electromagnetic wave production
  • Study the behavior of capacitors in DC circuits, particularly in parallel configurations
  • Learn about Ohm's Law and its application in circuit analysis
  • Explore the relationship between voltage, current, and resistance in electrical circuits
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Electrical engineering students, hobbyists working with circuits, and professionals seeking to deepen their understanding of current flow and circuit behavior.

daemonakadevil
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Hello friends i am weired in these questing , please help! .

1. What does negative current means , you can see AC current as sin wave graph means
ac goes +ve 1st then -ve & same process keep going , if you're going to say that -ve current means flow of current in charge flow direction then it means charge does vibrating which means wire is producing electromagnetic waves ?? right

2. suppose that if have a resistance & a (resistance+capacitance) in parallel
if we connect a dc batter in that || circuit . from which arm will current flow?
(from resistance arm or (resistance+capacitance) arm) & why?

3. what does voltage means ? , if voltage is high what & why happens in circuit??o:)

Thanks a lot! :-p
 
Last edited:
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1. Yeah, negative current just means opposite direction (eg. to the arrows on some diagram).

2. At first (the current alternates from off to on) some current will flow to both arms, but once the capacator charges the flow to that arm will stop.

3. If you consider an analogy to water flow, voltage/potential is a bit like pressure, it increases the current through narrow resistors..
 
And yeah, an ac does produce electromagnetic waves...
 

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