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Anonymous
Anonymous asked in Science & MathematicsEngineering · 2 months ago

Why would a resister slow down electrons from leaving a battery?

If you had a 9V battery, and the resister was 9 Ohms, this would only allow 1A of current to go through any one point along the circuit.

But if all the electrons on the negative side want to get to the positive side, why wouldn't they all immediately pack together at the beginning of the resister, and then go through it 1 Amp per second.

If there isn't any 9 ohms of resistance at the exit of the battery itself, then why wouldn't the electrons at least flow through that part of the circuit at a rate faster than 1 Amp, and then slow down at the resister?

Update:

Come to think of it, the electrons couldn't pack up at the beginning of the resister because they would repel each other.

So I guess I know now why most electrons would wait inside the battery, until the other electrons further down the wire pass through the resister.

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  • 2 months ago
    Favorite Answer

    First off, amp is NOT a speed.  It measures the flow.  Think of water flowing through pipes.  Amps doesn't measure how fast the water is going, rather it measure how much water is passing by a given point.

    Now imagine at one point the pipe becomes smaller.  This is resistance.  The voltage is how much pressure is applied to the water.  If you know the pressure (voltage) and you know how small the pipe gets (resistance) then you know how much water flows (current).

    If your studying electronics, we never talk about the speed of electrons, because it's not important.  (Unless your developing circuit breaker.)

    If you want to study the speed of electrons, that's a whole separate thing.  The base speed is the speed of light, and then electrons do in fact get slowed down by a resistor.

    Don't confuse speed and current.  Current is how many electrons pass by.  Speed is not used in electronics, because it's always going to be close to the speed of light.

    Addition,

    There are already elections along the wire and the entire circuit.  Back to the water pipes, the pipes are already filled with water.  So the water can only flow at a rate that the resistance will allow it.

    This is why electronics thinks in terms of electric charges and not electrons.  If you get to deep into the physics then it's easy to get lost.

  • 2 months ago

    A resistor does not slow them down, It reduces the QUANTITY of electrons flowing through the circuit.

  • 2 months ago

    sorry, you need to study basic electricity, this makes no sense.

    just to pick one statement, although the rest is justa as meaningless...

    1 Amp per second.?  1 amp is 1 Coulomb per second, so 1 coulomb per sec per sec is meaningless.

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