Handy man's workshop and laboratory . to secure better operation, text books on alter-nating currents should be consulted.—54 AN ELECTRICAL PARADOX With comparatively little apparatus, it is possible, apparently,to set Ohms law at naught by lighting an ordinary electric lighthaving a considerable resistance, to full incandescence while on 3io HANDY MANS WORKSHOP AND LABORATORY a heavy short circuit. All that is required is a medium-sizeinduction coil, giving, say, a four-inch spark, provided with apair of spark balls, a source of current for it, a glass condenseror Leyden jar of suitable capac
Handy man's workshop and laboratory . to secure better operation, text books on alter-nating currents should be consulted.—54 AN ELECTRICAL PARADOX With comparatively little apparatus, it is possible, apparently,to set Ohms law at naught by lighting an ordinary electric lighthaving a considerable resistance, to full incandescence while on 3io HANDY MANS WORKSHOP AND LABORATORY a heavy short circuit. All that is required is a medium-sizeinduction coil, giving, say, a four-inch spark, provided with apair of spark balls, a source of current for it, a glass condenseror Leyden jar of suitable capacity, a miniature incandescent lamphaving a resistance of from 5 to 10 ohms, and about a meter( inches) of heavy bare brass wire. The brass wire is to be bent into a long U about eight centi-meters ( inches) wide, and the ends inserted into an insulat-ing base. The lamp is then to be arranged so that it can be slidto any position between the parallel sides of the U. If the several parts of the apparatus are now connected as. Fig. 252—Apparatus for performing the electrical paradox shown in the diagram, and the knife switch is thrown, the usualheavy discharge across the spark gap, due to the energy momen-tarily stored in the condenser, will take place, and at the sametime, the lamp will be found to light up quite as well as if con-nected to the battery alone. Upon sliding the lamp, the lightwill be found to become dimmer, while it will grow brighter asthe bottom is approached. Indeed, if the lamp is small, it willbe well to place it close to the top at first, and then slide it down HANDY MAN S WORKSHOP AND LABORATORY 311 /T\ until full candle-power is reached, otherwise it might be burnedout from excessive current. The experiment is particularly strik-ing if the operating apparatus is concealed, and a fairly heavypiece of bare copper wire substituted for the short circuit. Asmall gage of wire should then be used for leads for the lamp,for, curiously enough, a fine pi
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