ammeter and voltmeter

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Ammeter and Voltmeter are connected in series and parallel respectively. Why?
Ans. In series connection, the same current flows through all the components. 
Ammeter aims at measuring the current flowing through the circuit and hence, it is 
connected in series, so that the same current that is there in the circuit flows through 
it and gets measured.
Voltmeter aims at measuring the amount of potential difference across a resistor or 
series of resistor. A voltmeter measures the potential difference of the circuit and it 
has high internal resistance. When the voltmeter is connected in parallel with a circuit 
component, the amount of current passing through the voltmeter is very less. 
Therefore, the current through the circuit is unaltered.

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