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## Using ground as a reference point for measuring voltages

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### Using ground as a reference point for measuring voltages

Hello. I have been reading about using some arbitrary point as ground in a circuit in order to measure voltages with respect to it but am still perplexed because the text I am reading does not seem to make clear why this is useful in electronics. Any help appreciated. Thank you.
webplodder

Posts: 1
Joined: Fri May 11, 2012 10:54 am

### Re: Using ground as a reference point for measuring voltages

Ground is only a connection point between all relevant components in the electronic circuit in order to make one reference point.

it is not really connected to the ground.

for example a battery with DC voltage (+ and -) connected to a voltage divider with resistors.

in order to measure the voltage on one resistor related to the battery you need to define a reference point.

you call the (-) tap of the battery a "ground" and measure all voltages related to this point (the + tap of the voltmeter connected to the measure point and the - tap connected to "ground" point)

another simple example is connecting to boards (to circuits together).

you must connect them with a reference point . you take the ground point of each circuit and connect them together.
electric_guide

Posts: 2
Joined: Sun May 27, 2012 12:36 pm