A _________ (V) _________ B
If a Voltmeter is connected in seris, (shown in the diagram) , the current that will be flowing through the conductor at A will be any hardly flowing at point B.A Voltmeter placed in seris will result in 0 potential because there will be minimal or no current flow after the Voltmeter (That would make conditions similar to an open circute) .This situation is just like you place a plastic instead of the voltmeter, will it conduct??NO because plastic has high restiance.
A ______ (V) ________ (BULB) ___ B
Suppose a Bulb(For Example) is connected after the voltmeter (which is arranged in seris) ,the bulb would not glow because the voltmeter has high resistance that would almost completly block the flow of current.This is not desiered to happen, actually makes no point by stoping the flow of current. The function of a voltmeter is to measure the potential difference accross two given points not stop or reduce the current.
RESISTANCE:The property of a substance to oppose current
When connected in parallel....
____(v)___
A ______ |__________| _____ (BULB) ___ B
(Take there is no gap between the wires here above ^^ )
The current flows to the Voltermeter and provides the reading and also same current would flow from A to B without disturbing the other electrical components.Also the BULB would glow.
Hence, voltmeters are connected in parallel.
:) :)