"most ammeter's binding post are made of heavy, bare metal whereas voltmeter terminals are usually much lighte

Question

"most ammeter's binding post are made of heavy, bare metal whereas voltmeter terminals are usually much lighte

Answer 1

That's because all the current needs to flow through the ammeter.

The voltmeter has a very high resistance and there is almost no current flowing when you take voltage measurements.

Answer 2

Ammeters are designed to measure large currents going through the meter - hence the massive terminals.

A volt meter draws a very small amount of current to make its measurement so does not need large terminals.

Answer 3

What is the question?

also you asked this before. And got answers.