পাতা:বিদ্যুৎ-তত্ত্ব শিক্ষক.djvu/৫১০

উইকিসংকলন থেকে
এই পাতাটির মুদ্রণ সংশোধন করা প্রয়োজন।

8እom বিদ্যুৎ তত্ত্ব শিক্ষক ELECTRO CHEMICAL EQUIVALEN T is the ratio of the mass in grams deposited in an electrolytic cell by an electrical current to the quantity of electricity. , ERG. C. G. S. unit of work and energy = one dyne acting through one centimeter. FARAD. Unit of electrical capacity. The international sarad is the capacity of a condenser charged to a potential of one internati,nal volt by one inter-" nationa coulomb of electricity = 10–" E. M. U. = 9x Ion 1 E. S. U. The one-millionth part of a farad (microfarad) is more commonly used. Farads = coulmbs/volts. FOOT-POUND. The work which will raise one pound one foot high. - FOOT-POUNDALS. The English unit of work = foot pounds/g. [g—acceleration produced by gravity. ' GAUSS. A unit of intensity of magnetic field = 1 E. M. U. = F x 10–1° E.S.U. GRAM-CENTIMETER. The gravitational unit of . work =g. ergs. HEAT OF THE ELECTRIC CURRENT generated in a metallic circuit without self-induction is proportional to the quantity of electricity which has passed in coulombs multiplicd by the fall of potential in volts, or is equal to (coulombs x volts);4, 181 in calories. © The heat in small or gram calories per second = (ampereso x ohms) /4181 = vols? / (ohms x 4'181) = (volts x amperes) /4 ISI = watts |4°181. HEAT. Absolute zero of heat— 273'13°C.,-218'5°R., –459.6°F. C e - HEFNER UNIT. Photometric standard. HENRY. Unit of induction. It is “the induction in a circuit when the electromotive force induced • *