Using two 1.5V AA batteries, you can use water as a conductor to light LED (light-emitting diode) lamp beads that emit red or other colors of light. The brightness of the lamp beads depends on the resistance and the light. Distance from the water resistance you use. There is a direct relationship. The lamp beads will not light up if you use distilled water, such as salt water, alkaline water, acidic water, etc. using ordinary tap water, and the lamp beads may even burn out.
How do you know if pure water, tap water or salt water is conductive or insulating? urgent!
No, unless you add a battery to the line. Because sodium chloride solution produces positive sodium ions and negative chloride ions because of water, this is the principle of its ability to conduct electricity, but it does not produce electricity, understand youz? To produce electricity, an external force must be generated to induce the ionic magnetic field. The aqueous solution of sodium chloride is therefore equivalent to a piece of wire.
Equipment: 3 beakers, three cups of three kinds of water, 2 batteries (one battery may not be powerful enough), some wires, a small light bulb (the type used for lamps pocket): Connect the batteries - Wire - water (wire inserted in the water) - Wire - bulb. (Try three types of water respectively) Phenomenon: Pure water (the bulb does not light up) Tap water (slightly shiny) Salt water (the brightest) Analysis: Tap water and salt water contain electrolytes (free electrons), they can therefore conduct electricity (free in tap water, there are fewer electrons than salt water, so the bulb is brighter in salt water); Pure water does not contain free electrons, so it does not conduct electricity.
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