a12v curcuit connected to 24v PSU what will happen?

Thread Starter

MarkSimms

Joined Apr 6, 2016
54
if you connect a12v curcuit connected to 24v PSU what will happen? the voltages 12v and 24v could be different, I just want to know what happens ? according to ohms law more voltage less amps , but same resistance, only watts would be the same, it seems like it would work out?

#12

Joined Nov 30, 2010
18,224
According to Ohm's Law, double the voltage = double the current.

profbuxton

Joined Feb 21, 2014
421
Formulate a theory about the result, carry out the experiment, write up the result and let us know your observations.

dl324

Joined Mar 30, 2015
15,820
if you connect a12v curcuit connected to 24v PSU what will happen? the voltages 12v and 24v could be different, I just want to know what happens ?
It depends on the circuit.

blocco a spirale

Joined Jun 18, 2008
1,546
if you connect a12v curcuit connected to 24v PSU what will happen? the voltages 12v and 24v could be different, I just want to know what happens ? according to ohms law more voltage less amps , but same resistance, only watts would be the same, it seems like it would work out?
It's very easy to find out what happens when you increase the voltage across a fixed resistive load.

Which version of Ohm's law are you thinking of?

crutschow

Joined Mar 14, 2008
32,873
You version of Ohm's law is not the one the rest of us use.

Willen

Joined Nov 13, 2015
333
If your load designed to handle 120mA at 12V (1.4 Watts) then the load's resistance is 100 ohms. If you double the supply then law says: 24V/100 ohms = 240mA (5.7 Watts). It's VERY high than needed so the circuits would be fried.

But it depends on circuit, some circuits have been designed with wide supply input voltage, eg- a circuit regulated by 78xx regulator.

BReeves

Joined Nov 24, 2012
410
Formulate a theory about the result, carry out the experiment, write up the result and let us know your observations.
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