. Hawkins electrical guide. Questions, answers & illustrations; a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications; a practical treatise. ied in practice, that with a rapidly alternating pres-sure, the condenser action is not perceptibly affected if the cables be connected across bysome non-inductive resistance as for instance incandescent lamps. Capacity.—When an electric pressure is applied to a con-denser, the current plays in and out, charging the condenser inalternate directions. As the
. Hawkins electrical guide. Questions, answers & illustrations; a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications; a practical treatise. ied in practice, that with a rapidly alternating pres-sure, the condenser action is not perceptibly affected if the cables be connected across bysome non-inductive resistance as for instance incandescent lamps. Capacity.—When an electric pressure is applied to a con-denser, the current plays in and out, charging the condenser inalternate directions. As the current runs in at one side and outat the other, the dielectric becomes charged, and tries to dis-charge itself by setting up an opposing electric pressure. Thisopposing pressure rises just as the charge increases. A mechanical analogue is afforded by the bending of a spring,as in fig. 1,279, which, as it is being bent, exerts an opposing force HAWKIXS ELECTRICITY eoual to that applied, provided, the latter do not exceed thecapacity of the spring. Ques. What is the effect of capacity in an alternatingcircuit? exactly opposite to that of assists the current to rise to its maximum value sooner thanjuld :-nit. If as - Qiu-^. Is it necessary to ha?c ■ continuous metalliccircuit fof an alternating current? No, it is possible for an alternating current to flowthrough a circuit which is divided at some point by insulating -—-• ALTERXATIXG CURRENT! 1,041 Ques. How can the current flow under such condition? Ans. Its flow depends on the capacity of the circuit andaccordingly a condenser may be inserted in the circuit as infig. , thus interposing an insulated gap, yet permitting analternating flow in the metallic portion of the circuit. RESERVOIR ^ -RUBBER DIAPHRAGM
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