What does it mean variable Direct Current ?

  • Thread starter vkash
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what does it mean "variable Direct Current"?

I am confused on the point where i see the word variable DC in a question(see attachment). If a DC vary like a curve then in some cases it can be like AC.
How is it varying
(Don't tell me answers.)
 

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  • #2
SammyS
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I am confused on the point where i see the word variable DC in a question(see attachment). If a DC vary like a curve then in some cases it can be like AC.
How is it varying
(Don't tell me answers.)
attachment.php?attachmentid=44417&d=1330285199.png

The DC voltage source is not varying , it's variable .

You apply a DC voltage at some value, and measure V1, V2 and I.

Then, change the DC voltage to a different value, and measure V1, V2 and I.

   
 

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