Transformer 10:1 his i 0 12 V Figure 4: Transformer with dc source. Shown in Figure...
2.120 pts] A schematic diagram of transformer is shown below. The closed path, l in the magnetic circuit in the Figure is traced by magnetic flux Ф. N,, N2, and 11, 12 are the numbers of turns and the currents in the primary and secondary circuits, respectively. The permeability, and cross-section of ferromagnetic core is, u and A İl(r) (a) [6 pts] Draw an equivalent magnetic circuit with two magnetomotive force, Vmmfi, and Vmmf2, magnetic closed flux, 4, and magnetic...
Question 7 A magnetic core is shown in Figure 1. Relative permeability of the core is 14 = 2000. Total number of winding turns in the left winding is NL = 100 and in the right winding is Nr = 10. Assume that the core cross section is uniform and the combined length of all air-gaps is much smaller than the dimensions of the core cross-section. Calculate the following: a) The magnetomotive force in the core if i = 2...
Consider the magnetic system in Figure 1 h? Figure1 When x = 0, there's no airgap between two parts of this system. The area of cross-section is m Assume x = 3t where t is the time. The total length of the whole iron magnetic loop (excluding airgap) is 9 m. Given dp-3000 , 40-4? × 10-7 H/m, and number of turns N = 20 Answer the following questions: (i) Calculate the reluctance the magnetizing path as a function of...
QUESTION 2 [20 marks] (i) [10 marks] A 120-V dc generator energizes a motor whose coil has an inductance of 50 H in series with a resistance of 100 2. A field discharge resistor of 400 2 is connected in parallel with the motor to avoid damage to the motor, as shown in Figure 3. Find the current through the discharge resistor 100 ms after the breaker is tripped. (The circuit breaker has been in the closed position for a...
iL(0+)=1A. a.) Assume that the capacitor is initially charged by a 25-V dc source not shown in the figure, so we have v(0+) = 25 V. Determine the value of v(0+) in V/s. (it is not 25, if you get 25, its wrong) Express your answer using three significant figures. b.) Find the particular solution for v(t). c) Find the general solution for v(t), including the numerical values of all parameters. KHW 4 P 4.65 Part A Consider the circuit...
2 0. The primary coil of a transformer has N, 4 50 x 10 turns, and its secondary has Ni 1.35 x 10 tuns. If the input voltage across the primary coil is av-(1so v) sin or, voltage is developed across the secondary coil? a. 332 v b. 454 V C. 382 V d. 726 e. None of the above A sinusoidal voltage Av (95 V) sin (100) is applied to a series Z-90 mH, C-11SpF, and R- 46 2...
4. (a) What is meant by time grading in protective systems? (b) In FIGURE 1, time graded relays control the circuit breakers. Which will have the shortest delay in operating for a fault at the location shown? (c) A voltage transformer for use on an 11 kV system has a star connected primary. If the turns ratio is 100/1 what will be the residual voltage of the open delta winding? (d) A 1 A electromagnetic relay has 80 turns on...
An electromagnet is constructed of 4% Silicon-iron as shown in Figure 6. current 1 cross sectional area of yoke, S N turns sample: cross sectional area,S thickness, t -effective path length, L Figure 5: Electromagnet Sensing Yoke It has magnetic path length L and yoke cross-sectional area S, in order to apply a magnetic field to a sample of a linear magnetic material with a relative permeability, μ, , of 100, The sample is also of area S and fits...
ll capace, expressed in oks. They 9. The opposition offered to the non offered to the flow of a C alensis XE. 1. Inductive Reactance 2. Capacitive Reactance 3. Impedance 4. Resistance 10. The opposition offered to the The opposition offered to the flow of an alteratine curenty inductance, expressed in ons. The symbol for characteristic is XL. 1. Inductive Reactance 2. Capacitive Reactance 3. Impedance when a voltage 11. What is the basic unit of capacitance? Example: A capacitor...
A common source amplifier circuit based on a single n-channel MOSFET is shown in Figure 4b. Assume that the transconductance gm-60 mS (equivalent to mA/ V) and drain source resistance, os, is so large it may be neglected. 0) Calculate the open circuit voltage gain Av Yout/ Vis. i) The amplifier has a load of 10 k2. Determine the current gain Va. = 12 V 150k 4k3 Vout Vin 200k GND = 0 V Figure 4b a) State the name...