Short circuit, bypassing, parallel with a short..

Kind of surprising that students do not know what happened when a resistor is in parallel with a short or short circuit. This situation is called bypassed. This will be what happens to a current flowing into a resistor in parallel with a short (a resistance of 0 ohm):

Parallel any resistor with a short
Parallel any resistor with a short

The parallel resistance of a resistor with a short or a resistance of 0 ohm, the formula says, Req=1/(1/R+1/0)=1/(1/R+∞)=1/∞=0 ohm. Any resistance in parallel with a 0 ohm resistance or short will be 0 ohm or short. Therefore we call the short a “bypass" because current will be detoured to the 0 ohm resistor. Look like common sense. Do you get it? Do not say that a short circuit current is infinite! Of course if you short out a battery, using ohm’s law, I=V/R=V/0=∞. But in this circuit, it is not the case.

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