Batteries, chewing gum foil to make fire

1.ready to test tools and cut into strips of aluminum foil.

2.Fold the foil two pairs in the fold of the cut a small triangle.

3.The tin strip cut a good pick in the 5th battery terminals.

4 .Tin strip in the middle begins to smoke, then flames burning appeared.

The middle section of the narrow ends slightly wider strip of chewing gum tin pick in section 5 battery terminals, after a few seconds, even in the middle of a fire breaking the foil. Recently, some circulated on the Internet and battery with aluminum foil to make fire the dynamic map, users were stunned by this amazing phenomenon, also questioned whether the real picture. Two seemingly unrelated supplies really easy to fire it? Yesterday, the reporter did a hands-on experiments.    Experimental tool    Scissors, gum foil,    1.5V alkaline batteries    Experimental procedure:    1 Remove the foil pack of chewing gum to start, cut width was 5 mm, 10 mm, about 9 cm long strip of several;    2 would cut a good note two pairs of folded tin in a small cut on the fold of the triangle, but do not cut, leaving a 5 mm or so "narrow ace", thus forming an intermediate long narrow slightly wider at both ends Article.    3 with the tin side of the strip of tin inwardly, one end of the positive electrode of the battery 5, the other end of the negative electrode of the battery to observe the results.    The experimental results    Among the different success rates of different width    Experiment one: Take a length of 9 cm and a width of 5 mm strip of tin, tin tin strip with one end of the positive battery at the other end of the negative battery. Soon obviously feeling the heat tin strip, cut a good middle note "narrow ace" at the beginning of smoke, then flames burning occurs, finally breaking the middle, the whole tin strip was completely burned, only the residual layer of tin. Reporter repeated the experiment several times, each time to make fire success.

   Test two: a length of 9 cm and a width of 10 mm strip of tin, with the method of operating the same. At this time the temperature rises rapidly at both ends of the tin strip, more hot than the width of 5 mm piece of paper, but in the middle of the "narrow ace" is just a wisp of white smoke coming out, you can clearly see the black scorch marks, but whole tin paper does not burn.     Experiment III: The length and width are the same, but do not cut out the middle strip of tin triangle, under the same experimental conditions, tin strip both ends quickly becomes hot, and more hot, reporters had to drop a note.    Principle    Foil can be conductive, connected to a battery short circuit    What happened between the foil and the battery, why would produce sparks? Reporters ask the lecturer, School of Physics, Central South University, Huang Shengxiang.    Huang said it was too junior high school physics principles. "Packaging chewing gum one side is conductive foil, it is cut into strips to make an equivalent of the wire, the resistance of tin is small, the access ends of the positive and negative electrode foil, a current loop is formed, which is usually said short-circuit. "   Why should the middle of tinfoil cut narrow it? "This is because the small cross sectional area of the narrow place, the ends of the resistance will be smaller than the wider, in the case of the same voltage, the voltage equal to the resistance multiplied by the current, where the current intermediate resistance smaller maximum temperature rise to the fastest Finally, burning up. "   Huang also reminded, in order to successfully make fire, foil width and "narrow smb" width is critical, too narrow in the smoke easily snapped, too wide may only smoke no fire. Foil width of about 5 mm, "narrow tip of the" best fit about 2 mm. "Directly to the width of the strip consistent access to battery positive and negative, not only can not make fire, still may cause a rapid increase in the temperature of the entire strip of tin, burn your fingers."Contact: Benny, SALE, Gebattery, Tel. 86-755-81762725, 81762726, 81762727, 23315028, 2331308 or email: sell(at)gebattery(dot)com(dot)cn. http://www.powbat.com.cnhttp://www.gebattery.com.cn