How should we understand control the voltage, not the current ?

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SUMMARY

The discussion clarifies the principle of controlling voltage rather than current in electrical circuits. It emphasizes Ohm's Law, specifically the relationship I = V/R, to illustrate how maintaining a constant voltage leads to variable current depending on load resistance. The example provided shows that with a constant voltage of 10V, changing the load resistance from 1KΩ to 100Ω results in a current change from 100mA to 10mA. This highlights the importance of voltage regulation in managing current flow effectively.

PREREQUISITES
  • Understanding of Ohm's Law (I = V/R)
  • Basic knowledge of electrical circuits
  • Familiarity with voltage and current relationships
  • Concept of load resistance in electrical systems
NEXT STEPS
  • Research voltage regulation techniques in electrical engineering
  • Explore the implications of load resistance on current flow
  • Learn about circuit design for stable voltage output
  • Investigate protective measures for voltage spikes
USEFUL FOR

Electrical engineers, students studying circuit theory, and professionals involved in power management and voltage regulation will benefit from this discussion.

Alex_Sanders
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How should we understand "control the voltage, not the current"?

And provide "roundabout" for spikes? I mean seriously, isn't V and A closely related? You regulate one, you end up regulate both?
 
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No, when you regulate the voltage you end up with constant voltage not the current.
Simply ohms law I = V/R
Despite the fact that we have a voltage which does not change, but the load current will change as load resistance is changing.
For V=10 and load resistance change from 1K to 100R causes the change in load current from 100mA to 10mA. Despite the fact that the voltage doesn't change at all.
 

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