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Consider the magnetic circuit of Figure with an air gap, while neglecting leakage flux. Correct for fringing by adding the length of the air gap lg = 0.1 mm to each of the other two dimensions of the core cross section AC = 2.5cm × 2.5cm. The mean length of the magnetic path in the core lC is given to be 10 cm. The core is made of 0.15- mm-thick laminations of M-19 material whose magnetization characteristic is given in Figure. Assume the stacking factor to be 0.9. Determine the current in the exciting winding, which has 100 turns and produces a core flux of 0.625 mWb.
A three-phase, 34.5-kV, 60-Hz, 40-km transmission line has a per-phase series impedance of 0.2+j0.5/km. The load at the receiving end absorbs 10 MVA at 33 kV. Calculate the follow
Q. A three-phase transformer bank consisting of three 10-kVA, 2300:230-V, 60-Hz, single-phase transformers connected in Y- is used to step down the voltage. The loads are connecte
Define Magnetic field The area around a magnet is known as the magnetic field and it is in this area that the effects of the magnetic force formed by the magnet can be detected
A 3.2m long bar of 16mm in diameter hangs vertically and has a collar attached at the lower end calculate the max. stress induced when a weight of 80 kg falls fromaheight of 32mm o
Q. Define amplification factor, drain resistance and transconductance and derive the relationship between drain resistance and trans conductance? Drain resistance It is the
Q. Three waveforms seen on an oscilloscope are shown in Figure. If the horizontal scale is set to 50 ms per division (500 ms for the entire screen width), and the vertical scale is
types of filtered power supply
Q. Consider the synchronous counter shown in Figure of the text. (a) Draw its timing diagram. (b) Show the implementation of the same synchronous counter using D flip-flops.
Q. A two-winding system has its inductances given by where k 1 and k 2 are constants. Neglecting the winding resistances, derive an expression for the electric force when
what is a armature reaction ?? give some concepts on double rotating field theory?? thanks
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