Question

Uses of Voltmeter. No spam answer or will be reported.

Answer 1

A voltmeter is an instrument used for measuring electrical potential difference between two points in an electric circuit. 

Originally Answered: What are the uses of a voltmeter?

Measuring voltage ranges.

Ampmeters measure current.

Ohmmeters measure resistance.

Continuity checking tools make sure circuits are closed.

These are all functions performed by a multimeter. Some can do more, some can do less.

Answer 2

you can do many things with it
measuring voltage:
1. checking batteries
2.troubleshooting project
3. verifying power is on or off to appliances,outlets etc...but be careful.
use of voltmeter as a general interface device:
*connect it to analog output of arduino ,or P