পাতা:মোটর শিক্ষক - শৈলজাপ্রসাদ দত্ত.pdf/৩৫৪

C寸t岱司*円 WCWN EL ELALALALL LL ALALELAeLMLLLLEELEALAeeLLLLL LLLLLLLLMLLAq qAAS SAAAAAALLAAAALA AAAA AALL LLLLLLLLSL RAlDIAN sa 8o” / Tr = 57'29578" s 57 - 7'45's 2o6265". SECÖHM. A unit of self-induction = I sec. x 1 ohm. THERMs small calories (obsolete.) THERMAL UNIT, BRITISH = The quantity of heat required to warm one pound of water at its temperature of maximum density one degree Fahrenheit s= 252 gram-calories. VOLT. The unit of electromotive force (E. M. F.) The international volt is 'the electromotive force that, steadily applied to a conductor whose resistance is one international ohm, will produce a current of one international ampere. The value of the E. M. F. of the Weston Normal cell is taken as I.o. 83 international volts at 2oo C. = Ioo E. M. U e I/3oo E. S. U. VOLT-AM PERE. ~ Equivalent to Watt/Power factor. WATT. The unit of electrical power = Io' units yof power in the C. G. S. system. It is represented sufficiently well for practical use by the work done at the rate of one joule per second. Watts = volts X amperes = ampereso X ohms = volts */ ohms(direct' current or alternating current with no phase diference). Wats x seconds = Joules. WEBER, A name formerly given to the coulomb. WORK in ergs - dynes x (m. Kinetic energy in ergs-grams x(cm/sec,)2. YEAR. days, hours, minutes, seconds. Anomalistic year 1 365 ES 3 48 Sidereal •, 1 , 3б5 б 9 934 ვნენ S 1 48 464 Tropic same as the ordinary year. umunssub