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A 6-pole, 50 Hz, 3-phase induction motor running on full-load develops a useful torque of 160 Nm and the rotor emf is observed to make 120 cycles/min. Calculate the net mechanical power developed. If the torque loss in windage and friction is 12 Nm, find the copper-loss in rotor windings, the input to the motor and efficiency. Given: stator losses 800 W (inclusive of wind age and friction loss).
Does the calculated result make sense? Discuss how the vacancies might have been introduced into the crystal.
Let x[n] be a finite sequence that is nonzero for n [N1, N2], and h(n) be a finite sequence that is nonzero n [N3, N4]. Answer the followings: a. For fixed n, what is the range of k that makes h(n-k) nonzero
The transmitter antenna is to be located on a rooftop at 15 m. The receiver antenna is to be installed at 5 m above ground level. determine the maximum height of a building at the centre of the path if transmitter and receiver antennas are separat..
why does the instruction set include an INC (DEC) instruction to increment (decrement) a memory byte when the same function could be accomplishe using an ADD (SUB) instruction
Suppose that the amount of a weekly bill of all households is distributed with a mean of $140 and standard deviation of $35. Let X var be the average amount of bill of a random sample of 49 households selected.
You decide to use Holzer's method to find the natural frequencies of the system and determine the mode shapes, and to construct a plot of total torque vs. a, over the frequency range where the mode frequencies exist.
Find the largest possible number of independant vectors v1=column[1 -1 0 0] v2= column[1 0 -1 0] v3=column[ 1 0 0 -1] v4= column[ 0 1 -1 0] v5= column[0 1 0 -1] v6= coolumn[ 0 0 1 -1] note all are column vectors
What focal length should a pair of contact lenses have if they are to correct the vision of a person with a near point of 57.3 cm Assume that the near point distance is 25 cm.
For a symmetric dielectric slab waveguide with the following parameters: n2 (core)=1.7, n1 (cladding) = 1.6 Calculate the range of core thickness such that the waveguide supports TE0/TM0 and TE1/TM1 modes but not TE2 modes.
A 100 MW power station delivers 100 MW for 2 hours, 50 MW for 6 hours and is shut down for the rest of each day. It is also shut down for maintenance for 45 days each year. Calculate its annual load factor.
Given a d'Arsonval meter movement with a full scale (FS) current of 50mA and a resistance of 2ohms, determine the value of the shunt that should be used to construct an ammeter (AM) with a sensitivity of 200mA FS.
Consider a 500-gallon tank that needs to be filled when the level goes below 25 gallons and will stop when the level goes above 475 gallonsControl systems can be either open-loop or closed-loop
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