Primary Batteries |
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Common terms and phrases
amalgamated zinc ammonic chloride ampere ampere-hours bottom carbon plate cent chemical action chromic acid Clark cell connected contains copper oxide copper plate copper sulphate crystals current flowing curve CuSO4 Daniell cell density depolarizer deposit diffusion dissolved effect electrodes electrolytic electromotive force external glass H₂O H₂SO heat Hence hydrogen immersed increase initial E.M.F. internal resistance Leclanché cell legal volts Lord Rayleigh mercurous sulphate mercury salt metallic molecule negative plate nitric acid ohms open circuit oxygen paraffin pile platinum polarization porous cup positive potassium potential difference quantity reaction rise of temperature rubber sal-ammoniac saturated shown in Fig silver chloride simple voltaic sodium bichromate solution of zinc standard cell Standard Daniell Cell sulphuric acid surface take place temperature coefficient terminals thermo-electric power tion total E.M.F. true volts tube voltaic element voltameter volts weight zinc and copper zinc chloride zinc rod zinc sulphate solution ZnSO4
Popular passages
Page 166 - The total energy of any material system is a quantity which can neither be increased nor diminished by any action between the parts of the system, though it may be transformed into any of the forms of which energy is susceptible.
Page 60 - The copper oxide is employed in the form of a compressed slab, which, with its connecting copper support, serves also as the negative plate.
Page 166 - In fact the doctrine of the Conservation of Energy is the one generalized statement which is found to be consistent with fact, not in one physical science only, but in all. When once apprehended it furnishes to the physical inquirer a principle on which he may hang every known law relating to physical actions, and by which he may be put in the way to discover the relations of such actions in new branches of science.
Page 85 - Charcoal, 3 parts ; mineral carbon or graphite, 1 part ; peroxide of manganese, 3 parts...
Page 85 - ... glucose and dextrine or starch 1 part, all by weight. These are intimately mixed dry, and then worked into a paste of proper consistency with a...
Page 169 - If we take as the unit of heat the heat required to raise one gramme of water from 0° C. to 1° C., and if t be measured in seconds, then H = 0-239 114.
Page 1 - No. 1, next page.) We will have frequent cause to refer to this table later, but as we will proceed from the ground up, we will now start in and describe the different batteries. An electric battery, or cell, as a single element is called, is a device for the conversion of the potential energy of chemical separation into the energy of an electric current. Thus the metal zinc on which sulphuric acid acts chemically represents energy of chemical separation in the potential form. If now the zinc is...
Page 168 - The unit of work is the erg. It is the work done by a dyne in producing a displacement of one centimetre in the direction of the force.
Page 158 - The positive and negative section« are fixed in position with insulating forks or tubes, and the positive terminal of one cell is joined to the negative of the next by burning or bolting.
Page 51 - The acid should always be poured into the water, and not the water into the acid. A glass, or other acid-proof vessel, thoroughly cleaned, should be used for mixing the electrolyte.