Eye Strain. When you stare at screens all day, your eyes can get tired. Take a break with the 20/20/20 rule. Look at an object at least 20 feet away for 20 seconds every 20 minutes, says Ivan Schwab, MD, a spokesman for the American Academy of Ophthalmology.
Once you have the dial on your volt meter set to measure voltage, simply touch the black lead to the negative (-) terminal on your battery and the red lead to the positive ( ) terminal on your battery.
You get a properly sized low value resistance of high accuracy like 1% known resistance say 1 ohm. Then you place the wire that you want to measure in series with the resistor and place the voltmeter across the resistor.So if you have a 1 ohm resistor and the meter is reading 1 volt then you have 1 amp flowing in there.ou get a properly sized low value resistance of high accuracy like 1% known resistance say 1 ohm. Then you place the wire that you want to measure in series with the resistor and place the voltmeter across the resistor.