A coil draws 1875 watts when connected to a
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A coil draws 1875 watts when connected to a 165 V dc source. It consumes 3072 watts when use on a 240 V, 60 Hz ac source. Find the inductance of the coil. Ans: ____ mH |
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- For figure (1)draw and calculate the voltages waveform across each half of secondary winding and across load when 100sin2π60t applied across the primary, then find PIV.A 120-V-rms 60-Hz sinusoidal voltage appears across a 500-turn coil. Determine the peak and rms values of the flux linking the coil.Please answer this NEATLY, COMPLETELY, and CORRECTLY for an UPVOTE. The coil of a generator has an equivalent resistance of 1.5 ohms at 20 °C. After being used for several hours, the resistance is found to be 1.75 ohms. Determine the temperature of the coils at this time. The temperature coefficient of resistance at 0 °C of the coil is 0.004 OC-1.
- Derive the expression for equivalent inductance for the following: 1. When two coils connected in series and the flux is adding. 2. When coils are connected in series but flux is opposing. 3. When coils connected in parallel and flux are adding. 4. When coils are connected in parallel but flux are differential coupledChoose the correct statement for pure inductor connected across single phase AC supply. a. Current leads the supply voltage by 90° b. Current lags the supply voltage by 90° c. Current and Voltage are in phase d. None of theseThe self inductance of a coil is a. Inversely proportional to current b. Inversely proportional to flux c. Inversely proportional to number of turns d. Directly proportional to current
- A toroidal coil, with a circular cross-sectional area of 0.2m2. The coil inductance is 0.28H. The coil has 500 turns. How much current should flow in the coil to get a flux linkage of 498? a. 498.000 A b. 140.000 A c. 1778.571 A d. 249000.000 A e. 889285.714 A10. A potential difference of 250 V is applied to a field winding at 15-C and the current is 5 A. What will be the temperature of the winding when current has fallen to 3.91 A applied voltage being constant. Assume temperature coefficient at 15'C is equal to 1/254.5 per °C2. A burst controlled triac is feeding a 200 ohm resistive load. The AC supply providing 240 V rms voltage at 60Hz. a) For one cylcle on, four cycles off control calculate the load rms voltage, current, power transferred to the load and efficiency. b) For four cylcles on, one cycle off control calculate the load rms voltage, current, power transferred to the load and efficiency.
- The field winding of a DC generator is wound with 900 turns and has a resistance of 50 ohm. If the winding is excited from a 240 V DC source, the magnetic flux linking the coil is 4mWb. Determine the self-inductance of the coil. Show your solution.6. The field winding of a DC generator is wound with 900 turns and has a resistance of 50 ohms. If the winding is excited from a 240 V DC source, the magnetic flux linking the coil is 4mWb. Determine the self-inductance of the coil.a) A sinewave is having a frequency of 50 Hz and instantaneous value of 200 Volts at 1.5 milli seconds. Find i) The maximum value of sinusoidal voltage waveform and i) The value of voltage at 1.6 milli seconds.