1.6. The resistance of a coil is 140 and its inductance 0.85 H. Determine the current, the p.f. and the circuit impedance when the coil is connected to 120 V, 60 Hz supply.
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- There era two type of currents, a. direct current and b. alternating current. For each of these type, name as many as you can the specific application and discuss them as to their effectiveness And safety.10. 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 °CPlease 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.
- A coil consists of 2000 turns of copper wire having a cross-sectional area of 0.8 mm2. The mean length per turn is 80 cm and the resistivity of copper is 0.02 un-m. Find the resistance of the coil and power absorbed by the coil when connected across 110 V d.c. supply.A resistor and a capacitor are connected in series across a supply of 250 Volts. When the supply frequency is 50 hz and the current in the circuit is 5 A. When the supply frequency is 60 hz, the current is 5.8 A. find C.Q9 / What are the function of brushes , pole and commutator in DC machine
- The Subject is Basic Electrical Engineering Chapter 15. Conductance, Susceptance and Admittance of AC Circuit.2.)What is the difference between Ampere's law and Biot-Savart's law?An iron core 0.4m long and 5 cm2. In cross section, is wound with 300 turns. When a current of 0.5 A flows in the coil, how much is the inductance of the coil. Assume the core has a permeability of 2500. Ans 350mH
- 2. 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.a) A coil consist of 2000 turns of copper wire having a cross sectional area of 0.8mm?. The mean length per turn is 80 cm and the resistivity of copper is 0.02µN-m. Find the resistance of the coil and power absorbed by the coil when connected across 110V D.C supply.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 A