Current vs Voltage: Can Voltage Decrease Without Current?

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Discussion Overview

The discussion centers around the question of whether it is possible to decrease voltage without decreasing current, particularly in the context of electrical circuits and components. The scope includes theoretical considerations, practical applications, and specific scenarios involving DC-DC converters.

Discussion Character

  • Debate/contested
  • Technical explanation
  • Experimental/applied

Main Points Raised

  • Some participants propose that voltage can be decreased without decreasing current by decreasing the load.
  • Others argue that the original question lacks context and clarity, suggesting that it does not make sense as presented.
  • Ohm's Law (V=IR) is referenced as a fundamental relationship between voltage, current, and resistance, but its application to the question remains debated.
  • A later reply clarifies that the question pertains to using a Buck DC-DC converter to step down voltage while maintaining high current output.
  • Participants express frustration over the lack of clarity in the initial question and the perceived waste of time in the discussion.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the initial question, with multiple competing views and a lack of clarity surrounding the context of the inquiry.

Contextual Notes

The discussion reveals limitations in the initial framing of the question, as well as assumptions about the application of electrical principles that remain unresolved.

Who May Find This Useful

This discussion may be of interest to individuals exploring electrical engineering concepts, particularly those related to voltage regulation and DC-DC converter applications.

neeraj kaira
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Is it possible to decrease the voltage without decreasing the current?
 
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neeraj kaira said:
Is it possible to decrease the voltage without decreasing the current?

yes, by decreasing the load.

Your question out of context really doesn't make any sense.
 
phinds said:
yes, by decreasing the load.

Your question out of context really doesn't make any sense.

I know this any other formula for it
 
neeraj kaira said:
I know this any other formula for it

Yes.

V=IR.

Voltage=current X resistance
 
neeraj kaira said:
I know this any other formula for it


Your question out of context continues to not make any sense.
 
Haha again ohm's law
 
neeraj kaira said:
Haha again ohm's law

Look, you are wasting people's time. Please stop doing that.

State your full question and application clearly, or this thread will be deleted.
 
And you are wasting mine...stop commenting
 
Thread closed. Check your PMs.
 
  • #10
Turns out his question was about DC-DC converters. From a PM exchange:

neeraj kaira said:
Ok let me tell you...i m thinking to make a charger which output should be 5v 1.5 - 2 A
And I'm getting 18 v after stepping down the voltage so i want ti decrease the voltage to 5volts keeping current high.
Hope you will get this .

berkeman said:
You use a "Buck" DC-DC converter to lower the voltage with high efficiency:

http://www.maximintegrated.com/app-notes/index.mvp/id/2031

They are available off-the-shelf, or you can build your own with a Buck DC-DC converter IC, an inductor, a diode, and a capacitor.

Regards,
berkeman
PF Mentor
 

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