* Why ammeter and voltmeter are always connected in series and parallel respectively ?

* Why the current flowing in series combination is same everywhere ?

plz. answer also answer my trignometric questions....

Hi,

Voltage is the difference in potential between two points.

So, if you connected a voltmeter in series all you are doing is measuring the difference in potential across a strand of wire which will be zero (or very near to zero). To measure voltage you connect the voltmeter in parallel so that you measure the voltage from the negative to the positive or the voltage drop across a load. Also, voltmeter has high value of resistance causing potential drop across the circuit which is not required.

Amperes are the measure of how much electricity is actually moving through a wire. So to properly measure you must connect in series so that the actual current flows through the meter and proper value of current are measured.

 

The current is the same everywhere, since the electron density and this drift velocity are the same all round the circuit.

Let’s understand it by an example:

Imagine current like water running through a pipe. The water is the current and the pieces of pipe are the resistors. Now, no matter how big or small the pipe is, the same amount of water has to run through it.

 

Hope this helps,

Good luck.