. The principles of physics. rcuit divided by the total resistance. Inthe example above the efficiency of the battery is1000 , __„ 1000+10°^^^°^*^^%- 485. Expenditure of eneryg. St,J The relative resistances of conductors carrying con-stant currents define therelative expenditure of en-ergy upon such energy may appear asheat, as mechanical work,or as that of chemicaldecomposition. The workdone is due to the currentand to a fall of potentialalong a conductor, and thefall is determined by therelative resistances. This subject may be il-lustrated graphically thus:Let the line A B (

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. The principles of physics. rcuit divided by the total resistance. Inthe example above the efficiency of the battery is1000 , __„ 1000+10°^^^°^*^^%- 485. Expenditure of eneryg. St,J The relative resistances of conductors carrying con-stant currents define therelative expenditure of en-ergy upon such energy may appear asheat, as mechanical work,or as that of chemicaldecomposition. The workdone is due to the currentand to a fall of potentialalong a conductor, and thefall is determined by therelative resistances. This subject may be il-lustrated graphically thus:Let the line A B (Fig. 400)represent the length of acircuit (say 1000 ft.), andthe line A C the total fallof potential; then obvious-ly the slope of the lineCB will represent theaverage rate of fall of po-tential throughout the cir-cuit. But suppose thatthe line for equal lengthsof the conductor varies inresistance. Thus assumethat one-tenth the resist-ance and consequently one-tenth the fall of potentialFig. 400. (C d) is included in the. EXPENDITURE OP ENERGY. 519 c6~STrsv\- L-jTre^—1>»—-mTn ...,..?/.?. ///•/&

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Keywords: ., bookcentury1800, bookdecade1890, booksubjectphysics, bookyear1895