# Alternating-Current Electricity and Its Applications to Industry Volume 1

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1914 edition. Excerpt: ... 0.16 Component of 0.10 amp. current in phase with voltage = 0.10 X cos 60 = O.io X 0.50 = O05 Total current in phase with voltage = 0.46 amp. Component of 0.25 amp. current lagging 90 behind voltage = 0.25 X sin 0 = 0.25 X 0 = 0.000 Component of 0.125 amp. current lagging 90 behind voltage = 0.125 X sin 90 = 0.125 X 1 = 0.125 Component of 0.20 amp. current lagging 90 behind voltage = 0.20 X sin 37 = 0.20 X 0.6 = 0.120 Component of 0.10 amp. current lagging 90 behind voltage = 0.10 X sin 60 = 0.10 X 0.866 = 0.087 Total current lagging 90 behind voltage = 0.332 Construct Fig. 193 drawing vector for 0.332 amp. 90 behind vector for 0.46 amp. and find resultant. / = V0.3322 + 0.462 = /0.3225 = 0.568 amp. The current through the combination equals 0.57 ampere per volt The power-factor of the combination can be computed as follows: By this method the resulting impedance, power-factor, etc., of all parallel combinations can be found. Prob. 60-6. An arc lamp containing 11 ohms resistance and 9 ohms reactance at 60 cycles is placed in parallel with a choke coil having 0.03 henry inductance and 6 ohms resistance across a 60-cycle circuit. What is the impedance of the combination? Prob. 61-6. If the parallel combination of Prob. 50 were placed across a 25-cycle circuit, what would be the impedance of the combination? Prob. 62-6. What is the power-factor of the combination of Prob. 50? Prob. 63-6. What is the angle of phase difference between the current and voltage of the combination in Prob. 51? Prob. 64-6. An induction coil of 20 ohms impedance and 75 per cent power-factor is placed in parallel with a choke coil of 18 ohms impedance and 3 per cent power-factor. What is the impedance and power-factor of the combination? 69. Mutual Inductance. It has been...show more

## Product details

• Paperback | 132 pages
• 189 x 246 x 7mm | 249g
• Miami Fl, United States
• English
• black & white illustrations
• 123655874X
• 9781236558749