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.
In this case, we know voltage (E) and current (I) so click on the E+I button.Next, click on the appropriate units which are 'volts' and 'milliamps'. Enter the numbers and then click 'calculate'. The answer is 75 ohms, .075 kilohms and .000075 megohms and you also get the wattage expressed in 3 different units.