Welcome to PhysLink.com - Your physics and astronomy online portal. Stay a while! Check out our extensive library of educational and reference materials. Also, check out our fun section!
How is water a good conductor of electricity? My ohmmeter indicates a lot of resistance in a bucket of water, yet I can get shocked a lot easier with the help of H2O.
Asked by: Robert Pope
Water itself is not a conductor of electricity. In order for a substance to carry charge, two conditions must first be met:
Answered by: Shaun Gladman, Student BHS
Partially right but: Water itself contains 1*10-7 mol/Liter positivly charged H+ and the same amount of negativly charged HO- (ph 7) leading to a conductivity of aprocimatly 0,055 µSiemens/cm (18,2 MOhm )for pure Water at 25 °C (compared with rainwater 35 - 100 µSiemens/cm dependent on Air Polution, River (Rhein Germany ) 300 - 745 µSiemens/cm ,Sea 42 000µSiemens/cm
The high conductivity of salty water are the Salt-ions but water has in any case an amount of ions
Answered by: Ralf Biehl, Ph.D Physics, University of Mainz, Institut für Physik
The primary factor at play as to why it is easier to get shocked when water is involved is that water, being a liquid, spreads over the surface of and into the nooks and crannies of your skin much better than contact with a solid would, thus increasing the surface exposure of your skin to the electric shock.
Answered by: Howie Soucek
Another phenomena that can happen once you try to expose water to a high electric potential is that it starts ionizing, i.e. you start creating ions in the water just from the strong electric field. Then you might end up with an ion trail being created, very much like the one created in the air during lightning, where the conductivity becomes very high. This trail becomes the passage for the current with almost no resistance.
In any case avoid lightning, and electricity around wet things.
Answered by: Anton Skorucak, PhysLink.com
Here are our physics & astronomy bestsellers:
Magnetic Levitator - Classic
3D Magnetic Field Tube
Revolving Multi-Color Fiberoptic Light
KonusScience 5 Way Microscope Kit
Tin Can Robot 4M Kit
Mini Plasma Ball
Wood Grain Newtons Cradle
12 inch Galileo Thermometer