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.
Measuring electricity. We can measure electricity in a number of different ways, but a few measurements are particularly important. Photo: You can use a digital multimeter like this to measure voltage, current, and resistance. Voltage. The voltage is a kind of electrical force that makes electricity move through a wire and we measure it in volts.