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explain why an ammeter and Galvanometer is placed in the series in a circuit where is a voltmeter is placed in parallel ...
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Amperes and Galvanometer 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 so it can be measured.
Because Voltage is the difference in potential between 2 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 measure voltage you connect the voltmeter in parallel so that you measure the voltage from the - to the + or the voltage drop across a load.
In parallel combination voltage across the each arm remains the same and current distributes so to measure voltage we always connect the voltmeter in parallel so that we measure the voltage drop across a load.On the other hand in case of series combination current across the each arm remains the same and voltage distributes so to properly measure we must connect ammeter in series so that the actual current flows through the wire can be measured.
Since voltmeter has a very high value of resistance and ammeter has very low so to control the value of effective resistance and avoid excess loss of energy within the whole circuit we always connect the voltmeter in parallel and ammeter in series.
Because Voltage is the difference in potential between 2 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 measure voltage you connect the voltmeter in parallel so that you measure the voltage from the - to the + or the voltage drop across a load.
In parallel combination voltage across the each arm remains the same and current distributes so to measure voltage we always connect the voltmeter in parallel so that we measure the voltage drop across a load.On the other hand in case of series combination current across the each arm remains the same and voltage distributes so to properly measure we must connect ammeter in series so that the actual current flows through the wire can be measured.
Since voltmeter has a very high value of resistance and ammeter has very low so to control the value of effective resistance and avoid excess loss of energy within the whole circuit we always connect the voltmeter in parallel and ammeter in series.
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