Brass
Brass
brass
carbon
We find carbon or graphite as the center electrode of a zinc-carbon battery. It's the "common" battery we use in lots of stuff (but not an alkaline battery). That center electrode is the positive one, and the zinc makes up the outer or negative electrode in this battery. In an alkaline battery, manganese dioxide is the center, or the cathode (positive electrode). Powdered zinc will be found as the outer or negative electrode (anode).
A can of food or soda, flashlight battery, drinking glass, soda straw, paper roll at the center of a roll of paper towels
The idea of a wind up flashlight came from the 1959 movie, journey to the center of the earth.
The idea of a wind up flashlight came from the 1959 movie, journey to the center of the earth.
A flashlight is a series circuit. The batteries positive end connects to the flashlights switch. The switch connects to the center pin of the light bulb. The bulb filament is connected to the center pin of the bulb and the outer metal shell of the bulb socket. The shell of the bulb socket is connected to the metal flashlight's body which returns to the negative end of the battery. Turn on the switch and you have light.
Electrode patches will be placed near or on the right arm, right leg, left arm, left leg, and the center left side of the chest. The cable will be connected to the electrode patches
Look directly behind the radiator...slightly to the right of center of the vehicle and then down. Get a flashlight and look for a small yellow pull that is the top of the dipstick. It is wedged in between the battery pedestal (right) and another item (left).
The electrodes of a good spark plug are sort of tan in color, and the center electrode, if there is one, has a fairly sharp edge all the way around. A bad spark plug can be black, or oily black, and the electrodes may be black-ish even down inside the ceramic where the center electrode comes out. The electrode edges may be worn down and rounded. A bad spark plug will not have a continuous path from where the spark plug wire attaches to the center electrode. This can be checked with an ohm-meter. If you're still not sure, it is best to replace spark plugs - they have a definite effect on power and gas mileage.
An ordinary transformer has two input/output terminals but a center tapped transformer has 2 input and 3 output terminals. One is taken from the center for a ground connection. This causes it to get 50% of the actual value. And ordinary transformer contains 2 windings. An autotransformer has one.