Distinguish between ammeter and voltmeter

Ammeter :
1) It is used to measure current.
2) To convert galvanometer into ammeter, a low resistance is connected in parallel to galvanometer.
3) In a circuit, ammeter must be connected in series.
4) Resistance of an ideal ammeter is zero.
Voltmeter :
1) It is used to measure potential difference.
2) To convert galvanometer into voltmeter, a high resistance is to be connected in series
3) In a circuit voltmeter must be connected in parallel
4) Resistance of an ideal voltmeter is infinity.