what does really grounding the circuit mean and why is it necessary.?

can't a circuit be completed without grounding.

Update:

we're informed to connect the wire to -ve terminal of the battery when the ckt diagram says to ground. How does this work.

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  • 1 decade ago
    Favorite Answer

    "Ground" is another term for an electrical potential of zero. It can also be called "earthing".

    The problem with most (large scale) circuits is that there is often no "common ground" to make everything appear relative to everything else. To be more specific ... just because you've used the negative terminal of your battery as a "ground", doesn't mean the terminal is at ground; it's just the lowest potential point in the circuit.

    That point could actually be at several volts (or several THOUSAND volts) potential, relative to "true earth" or zero. If such a thing were to occur, it is highly likely that there would be a point that you could touch (when the circuit is energized) that would literally blow your socks off ... because YOU'RE standing on the ground and are at a lower potential than any point of the circuit.

    The real reason for grounding is to make electrical circuits safe - both for the elements of the circuit and for the people that have to deal with them.

  • Anonymous
    1 decade ago

    1.All electrical circuits must be grounded as a safety precaution by connecting a thick copper wire to the body of the equipment.and connecting other end to an earthed conductor.

    2.In case any live wire touches the body of the equipment the user is saved of the shock as the current get grounded through the grounding wire which has got a low resistance.

    3.It is not safe to complete electric circuit with out grounding.

  • 1 decade ago

    if it is a battery or small source of power then it doesnt need to be connected to ground.

    the earth or ground or soil can be viewed as a conductor with an infinite number of parallel paths (ie very low resistance)

    connecting the neutral conductor to ground means that the voltage cannot get above a certain level.

    generally a lot safer.

    in bathrooms isolation transformers are used to remove this effect. the idea being that a circuit cannot be made through the ground. these are very short circuits and would only supply 1 piece of equipment.

  • Ed
    Lv 6
    1 decade ago

    Grounding has at least three purposes.:

    Safety

    Better performance of electronic circuits

    Use of ground return.

    Grounding of equipment protects against accidental shock if a live conductor contacts the equipment. Over current devices remove power. Otherwise a person coming into contact with the live equipment could suffer electric shock. It also limits the amount of voltage that can appear on the circuit. Too much voltage causes over current devices to operate.

    On electronic circuits, grounding of shields dissipates unwanted stray currents.

    On long circuits, such as telephone lines, ground can be used as one of the two required conductors. Electric-driven railroad engines and trolley cars use the same principle.

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  • 1 decade ago

    on every schematic plan (most) you will notice a ground symbol and somewhere else you will notice an end that has a V- on it (this is where you would put a negative dc charge) and the ground is where everything goes back tot he power source of a dc power source

    and when you see multiple symbols on the circuit they all attach together and go to the + terminal of the power source

    ground is basically just the signal for returning the current back to the source of the current

    as with ac currents same thing

    it goes back to the source

    then there is ground earth

    where basically is just a copper rod lodged into the ground and when it is chraged it grounds the electricity

  • vazid
    Lv 4
    4 years ago

    In electric powered engineering, floor or earth is the reference think approximately an electric powered circuit from which different voltages are measured, or is a elementary return direction for electric powered modern-day, or a right away actual connection to the Earth. electric powered circuits could be linked to floor (earth) for various motives. In mains powered kit, uncovered metallic components are linked to floor to dodge touch with a volatile voltage if electric powered insulation fails. Connections to floor decrease the build-up of static electrical energy while dealing with flammable products or electrostatic-soft gadgets. In some telegraph and power transmission circuits, the earth itself could be used as one conductor of the circuit, saving the fee of putting in a separate return conductor.

  • 1 decade ago

    safety purposes bro =)

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