Some pls tell me why Votimeters are always connected in parrallel and why ammeters are always connected in....

Question

And why why ammeters are always connected in series!

Answer 1

Ammeters measure current. Voltmeters measure voltage which I'm sure you already knew. Ammeters are in series because current must flow through them to calculate a value (you can't measure river current by measuring from the beach). A voltmeter doesn't need to be in series though because it measures voltage drops across a resistor (a wire has some resistance). Voltmeters have close to infinite resistance so current doesn't flow through it. So theres no harm in putting them in parallel.

Answer 2

Voltage and current are different aspects of electricity.

Voltage is like a force or pressure. If you were to measure the water pressure of a water faucet you would not turn on the water and hold the gauge in the stream. You must seal the pressure. No water flow is necessary.

Now Amperage is quite different. Amperage is like speed. To find out how many gallons per minute that a sprinkler is using, all of the water flowing to the sprinkler must be counted. This is done by disconnecting the sprinkler, then inserting a water counting device. Any water that the sprinkler gets must first go through the counter.

Answer 3

Because Voltmeter measures potential difference BETWEEN two points so it should be connected to these two points and the only way for circuit and voltmeter to be both connected to the same 2 points is in parallel.
Ampermeters measure the current THROUGH some circuit so the same current that is flowing through this circuit should flow through the ampermeter too. The only way is to let the current going through the circuit to go through the ampermeter later or before, so you have to connect ampermeter in series with your circuit.
The fact that voltmeters have high resistance while ampermeters have low resistance is the side effect of the way how they are connected to reduce the error introduced by devices into measured value.

Answer 4

Voltage meters are used to find the difference between 2 potential ( Phase c/w neutral ) usually getting 230 v , 440 v and higher in a/c and lower voltage reading in d/c and is usually stagnant and stable for useage.
While amp meter is the amount of current flowing in the cable in useage towards the load.
Eg. if you take a battery , you can measure the voltage by connecting to the + & - and connect the amp meter in series to the load eg. bulb to see the amount of current that flows to light up the bulb.
Another example : At the water tap - when you turn on - the force in which the water gushes out is the pressure ( volts ) , while the amount of water in volume is ( amperes.)
So from the Electrical Engineering point of view , in view of its resistance , voltmeters are connected in parrellel while amp meters in series.
It is thumb rule and reasons and will be quite difficult for a non electrical inclined individual to grasp it.

Answer 5

Voltmeters have a high resistance and can't be connected in series because they would affect the operation of the cct, in fact all they would measure is the supply voltage.
Ammeters have to be is series so that current will flow through them. If you connect an ammeter across a cct, it will be a virtual short cct. due to their low resistance, and the meter and the power supply will be destroyed.

Answer 6

Alexy V is correct, but to put it more simply:

Voltage is, *by definition*, the difference between potentials *between* 2 points. A voltage *is* the comparison of potentials between two points.

Current is, *by definition*, the speed of electrons traveling *through* a conductor (number of electrons per unit time). Thus, it must be measured in a way that can determine the travel of electrons through a conductor. There *are* ammeters that measure current indirectly (magnetic field), but the standard (classic) method is to measure directly (in circuit).

Jim, http://www.jimpettis.com/wheel/

Answer 7

Voltmeters are connected in parallel to measure the voltage across a circuit. i.e. the voltage between the neutral (grounded current carrying conductor) and hot wire.
Or between phases on a 3 phase circuit. Hence they have lot higher internal resistance so they will not load the circuit down.

Amp meters are connected in series because they are designed and used to measure the current (Coulombs) flowing through the circuit. Hence they have a very low internal resistance. so they will not restrict (add resistance) to the circuit.

Answer 8

I tried to answer your question.

Like to measure potential between two points, the only way is to connect the two points by a volt meter, the only way to answer your question is to repeat what Alexey V has answered.

Answer 9

To the suited of my expertise, Richard Gere and the Dalai Lama are joined on the hip...possibly even dwelling collectively. i do no longer understand no rely if or no longer they have puppy gerbils.... (BTW, Richard Gere is married to actress Carey Lowell, and that they have 2 babies: 'Hannah'--from Carey's earlier marriage, and 'Homer' collectively)