### Network

#### bhuvanesh

Aug 29, 2013
201
"the maximum power transfer to load resistance in voltage divider circuit is 0"
i know the reason why zero.but i dont know what actually the power trasfer.explain me basically.thank you in advance"

#### (*steve*)

##### ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
Moderator
Jan 21, 2010
25,505
I can assure you that a voltage divider can transfer power to a load, so your question is clearly wrong.

What do you actually mean?

#### bhuvanesh

Aug 29, 2013
201
when r load is 0.obviously v load is 0.so i load is zero .so no power transfer.
when r load is infinite .v load is v source then i =0.so no power transfer
sorry if i am wrong

#### Harald Kapp

##### Moderator
Moderator
Nov 17, 2011
12,516
Consider: what if rload is neither 0 nor oo ?

#### bhuvanesh

Aug 29, 2013
201
oh ok.you mean at bang-bang state(extreme min or extreme max) only power transfer will be 0.
i am newbie to electronics.what exactly mean power transfer.it mean that transfer of both voltage and current or something other

#### Harald Kapp

##### Moderator
Moderator
Nov 17, 2011
12,516
Power transfer means that power flows from a source (e.g. battery) to a load (e.g. resistor).
If you put a (load) resistor across the output taps of a resistive divider, this load resistor will se a voltage. The voltage will drive a current through the resistor. The resistor will dissipate power.
Imagine using a lamp as load resistor. You will see the power transferred by the light of the lamp.

#### bhuvanesh

Aug 29, 2013
201
does in any circuit is there any possibilities to exist current alone or voltage alone.it may be crazy question.but.please answer

#### Harald Kapp

##### Moderator
Moderator
Nov 17, 2011
12,516
Current alone: only if the resistance is zero. Google superconductor
Voltage alone: yes, e.g. a batttery without load

#### bhuvanesh

Aug 29, 2013
201
okay if we transfer only the current or either voltage to load resistance say(bulb).is that power transferring.because p=v.i.i am thinking that transfer of both voltage and current only mean power transfer

#### (*steve*)

##### ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
Moderator
Jan 21, 2010
25,505
Current without voltage, and voltage without current mean zero power (and with AC there is yet another way).

However practically, none ever happen perfectly. Voltage without current can be nearly ideal, and with AC it's possible to get close because it doesn't require infinite anything. DC current without voltage (outside superconductors) occurs rarely -- although applications with current limited sources (practical form of a constant current source) can be close.