The internal impedence of an ammeter is very low. So if it
is connected in parallel with any circuit, the equivalent
resistance of the circuit reduced to almost zero.
On the other hand voltmeter has very high internal
impedence, So if it is placed in series with any device
then that device become almost open circuited.
Thats why these devices are connected in such manner.
WHEN THE AMMETER IS CONNECTED IN PARLLEL IT WILL BURN
BECAUSE THE INTERNAL IMPEDANCE OF THE AMMETER IS
CONSISDERLY VERY SMALL , BUT IF WE CONNECTED THE VOLTMETER
IN SERIES ,NOTHING WILL HAPPEN BECAUSE ,THE INTERNAL
RESISTANCE OF THE VOLTMETER IS VERY HIGH , IT JUST LIKE A
CONNECTING A HIGH VALU RESISTER PARALLEL TO LINE.
Ammeter is used to measure the current flowing through a
circuit element and current is nothing but it is due to a
continuous flow of electrons. We take caution also in
connecting (+) & (-)terminal of ammeter in which electrons
flow from (-)to (+)just opposite to the direction of
current. This is all about for series connection of ammeter
in circuit. If we take reason about parallel connection of
voltmeter across the circuit element then we should know
that it measures the voltage difference between the
required points of circuit element which can only be
measured by connecting it across the circuit element rather
than series connection of it.
ammeter connected in series bcoz it has low resistance
material in low ressistance material the total current
flowing so it measures the total current
voltmeter is high resistance so high resistance low
current high voltage it measure the voltage bet ween two
Ammetre is connected in series because - it contain very low
resistance . And also current is also moves in a straight
line in - to + so ammetre is nessesary for shifting in
straight line or in series.
voltametre is conected in parallel because - it contain
high resistance which can change the value of electric
current. voltametre gives p.d between two points .
In series the current has to flow through all the elements
or load, and in a single circuit the same current flow from
positive potential to the negative potential therefore to
measure the total current produced in a circuit we should
connect the ammeter in series and that is the same reason
also why the current is same in a series connected load.
The voltmeter measures the potential difference between two
points i.e. from higher to lower(drop) or lower to higher
(rise)so to measure a voltage in a battery we have to
connect the voltmeter across the battery whereby it get
connected between positive potential and negative potential
similar is the way to measure voltage across any load or
device that is the reason why a voltmeter is connected in
parallel(i.e. across) the load.
I m doing btech with computerscience branch.For every
campus placement eligibilty criteriais is 60%.I have 65% in
highschool and b.tech till now but secured 59.6% in
intermediate. So would this percentage b considered as 60%
or i wont b able to sit in exams?kindly post your views?