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Q. A dc series motor operates at 750 r/min with a line current of 100 A from the 250-V mains. Its armature-circuit resistance is 0.15 and itsseries-field resistance is 0.1 . Assuming that the flux corresponding to a current of 25 A is 40% of that corresponding to a current of 100 A,determine the motor speed at a line current of 25 A at 250V.
Overcoming power shortages: NEP aims at meeting both energy and peak demand fully through 2012 along within creating 5 percent spinning reserves at national level. The policy
Q. What is the difference between field effect transistor and the bipolar junction transistor? The important points of the comparison between the field effect transistor ands t
A transistor has (A) One p-n junction. (B) Two p-n junction. (C) Four p-n junction. (D) Five p-n junction. Ans: A transistor has two p-n junctions.
Static scherbius Drive By using this scheme, below and above synchronous speed can be obtained for an induction motor. There are two possible configurations to obtain s
Selection of Proper Fuse : Fuse is a safety device or a wire of metal in a cut-out which may be fused by an excessive current. The current drawn by an appliance is restricted by t
Design and using Pspice, evaluate a single-stage transistor amplifier amplifier to meet the following specifications: * Power supply - 12V dc. · *Voltage gain - 120 when Vin
PRINCIPLE OF LED
An electromechanical voltmeter with internal resistance of 1 k and an electronic voltmeter with internal resistance of 10 M are used separately to measure the potential differenc
Q A high-pass filter circuit is shown in Figure. Using a PSpice program and PROBE, obtain the Bode magnitude plot for the transfer function ¯H(f) = ¯V out / ¯V in for frequency ra
Three transformers are provided with the following rating values: 1) 2400/240 V, 55kVA, Req1 = (0.1 + 0.0Y) Ohm and Xeq1 = (0.15 + 0.XX) Ohm. 2) 240/120 V, 25kVA, Req1 = (0.1
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