✔ Do Resistors Short

Do Resistors Short

- March 14, 2018

Resistors limit the flow of electrons reducing current. If a short occurs in a resistor in parallel with other resistors the voltage drops across the other resistors will decrease to zero.

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The 100w resistor is not impacting the circuit.

Do resistors short. We make short circuits with wires. Voltage comes about by the potential energy difference across the resistor. For analysis purposes the 100w resistor can be removed.

The real world wire is going to have some resistance. Therefore the resistance of the short circuit is 0 ohm. Now if you calculate equivalent resistance of the 20 ohm and 0 ohm resistor then you get 0 ohm.

The other resistor is marked red red gold gold and the last band i cant make out. The voltage across the 100w resistor is going to be zero. Resistors limit the flow of electrons reducing current.

In ideal condition the resistance of a wire is 0 ohm. Think everything you have on the circuit a resistor even the wires to connect different component. Do resistors reduce voltage or current.

The mathematical answer is that a resistor is a two terminal electric device which obeys or you could say enforces ohms law. If a short occurs in a resistor in series with other resistors the voltage drops across the other resistors will increase. Generally speaking resistors fail short circuit but a high value resistor with a voltage across it exceeding its maximum voltage rating can fail short by arcing over which can drastically reduce the resistance value.

A resistor is a little package of resistance. All current will bypass the resistor and travel through the short. As you can see in the top photo on this page a resistor is a short worm like component with colored stripes on the side.

From the outside all resistors look more or less the same. It might be possible for the old style resistors to decrease in value if the package itself got baked and shrunk but its likely that it would burn up before it would short. Wire it into a circuit and you reduce the current by a precise amount.

Voltage comes about by the potential energy difference across the resistor. There are resistors that are guaranteed to not go short circuit in a failure they generally have a clause something like defined interruption behavior in their description.