Question

define ammeter and electric potential difference​

Answer 1

Answer:

an instrument for measuring the strength of an electric current

The electrical potential difference is defined as the amount of work done to carrying a unit charge from one point to another in an electric field. In other words, the potential difference is defined as the difference in the electric potential of the two charged bodies.

Answer 2

Ammeters have to be connected in series (in the same loop of the circuit) with the electrical component whose current you are measuring. ... Potential difference is the energy used between two points in a circuit, therefore it is measured between two points either side of a component.