What would be the consequence of having high resistance in an ammeter?

Having high resistance in an ammeter directly affects its ability to measure current accurately. An ammeter is specifically designed to have low resistance so that it doesn't significantly alter the current flow in the circuit it is measuring. When the resistance is high, the ammeter cannot provide an accurate reading because it introduces a voltage drop in the circuit, leading to a situation where the current flowing through it is reduced. This misrepresentation of current leads to unreliable measurements, which can give an erroneous sense of the circuit performance. Accurate current measurement requires minimal interference with the circuit, which is why low resistance is a crucial design characteristic of ammeters.