Re: HELP!! Need answers for test!!!

["petem" <petem001@xxxxxxxxx>]

I do not agree and this link will say the same

http://www.answers.com/topic/resistor

a resistor is limiting current not voltage


"Robertm" <Respond@xxxxxxxxxxxxx> a écrit dans le message de news:
dnf3hr$8ru3$1@xxxxxxxxxxxxxxxxxxxx
>
> "Frank Olson" <Use_the_email_links@xxxxxxxxxxxxxxxxxxxxxx> wrote in
> message news:o8Emf.86172$Eq5.55760@xxxxxxxxxxx
>> Robertm wrote:
>>> "Gator" <karlwithgator@xxxxxxxxx> wrote in message
>>> news:1134230554.622109.98820@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
>>> What device reduces
>>>
>>>>current?a)resistor, b)capacitor?
>>>>
>>>
>>>
>>> Not enough information given for an (a) or (b) answer. A resistor will
>>> reduce both ac and dc current. A capacitor will reduce ac current
>>> dependent on frequency and value of capacitor, while completely blocking
>>> dc current. If we are talking dc, then a resistor will reduce the
>>> current somewhat whereas a capacitor will reduce it to zero after the
>>> initial inrush current.
>>>
>>> Bob
>>
>>
>> A resistor won't reduce current.  It'll drop voltage, but the current
>> remains unaffected.  A capacitor will reduce current.
>
> I agree, if we are looking strictly at the added resistor, it is a voltage
> dropping device, not a current dropping device, and all calculations for
> the load are based on the dropping voltage across the added resistor even
> though the net effect of the resistor is that the current will be reduced
> by reducing the voltage, assuming a series resistive circuit.
>
> Bob
>