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Q. A 10-hp, 230-V dc shunt motor takes a full- load line current of 40 A. The armature and field resistances are 0.25 and 230 , respectively. The total brush-contact drop is 2 V, and the core and rotational losses are 380 W. Assume that stray- load loss is 1%of output. Compute the efficiency of the motor.
how to calculate voltage when 3 voltage sources are given?
The upper end of a hanging chain is fixed whereas the lower end is attached to a mass M. The (massless) links of the chain are ellipses with major axes and minor axes l+a and l-
Q. Show Transformer equivalent circuits? Transformers come in various sizes, from very small, weighing only a few ounces, to very large, weighing hundreds of tons. The ratings
how to design a 32:1 multiplexer using two 16:1 multiplexers and a 2:1 multiplexer?
(a) Design a 2 nd order Sallen and Key low pass active filter with the following characteristics: Nominal Cut-off Frequency: 1.6 kHz Variable Gain: 0 to 7.5 dB You may a
COULD U INTERDUCE AN OSILATOR THAT MAKES TRIANGULAR AND SIN WAVE?
Explain Synchronisation and Parallel Operation Generation, transmission and distribution of electric power have to be conducted in an efficient and reliable way at a reasonable
Q. Consider a current element I 1 d ¯l 1 = 10 dz ¯az kA located at (0,0,1) and another I 2 d ¯ l 2 = 5dx ¯ax kA located at (0,1,0). Compute d ¯F 21 and d ¯F 12 experienced by
Q. A person, while driving a car in a cyclone and waiting at an intersection, hears a thumping sound when a power line falls across the car and makes contact with the chassis. The
(a) Which one of the four digital-to-analog conversion techniques (ASK, FSK, PSK or QAM) is most susceptible to noise? Explain your answer. (b) Given the bit pattern 01001110,
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