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4-pole , 500 volts shunt motor has a simplex lap winding placed in 80 solts , each cotain 30 conductors . The shunt filed resistance and the armature resistance are 250 and 0.005 ohm respectively . the flux per pole is 0.001 webers . The torque developed is 20 Nm when the motor current is 52 amp . Determine : 1- the number of armature conductors 2- the motor speed
n electrical heater is connected to a constant 250-V sourceand absorbs 1000W. Subsequently, the heater is connected to a constant 220-Vsource. What power does it absorb from the 220-V source. What is the resistance of the heate.
Three loads are connected in parrallel across a 250 Vrms line. Load 1 absorbs 16 kW and 18 kVAR. Load 2 absorbs 10 kVA with a power factor of 0.6 leading. Load 3 absorbs 8 kW with a power factor of 1.
A transmission line segment with Zo=50 Ohms and of length l is terminated at a load resistance of RL that can be varied. Sketch the input impedance Zin as a function of RL if l=(wavelength/4)
Design a square wave oscillator using an (ideal) operational amplifier. Verify your design with Spice-like software waveform. Specifications: peak value: ±5 V, frequency: 1000Hz, duty cycle: 50%.
The forces 20N,30N,40N,50N and 60N are acting on one of the angular points of a regular hexagon towards the other five angular points taken in order. Find the magnitude and direction of resultant force
A windmill has a diameter of 3 meters. It converts wind enegry to electrical enegy with a efficiency of 40% of the theoretical maxium for windmills. What is the eelctric power output at a wind velcity of 15 miles per hour.
d^2y/dt^2 - 6dy/dt +36y(t)=25 dx/dt find the zero input response of the system given y(0)=1 and dy/dt when t=0 = -3 find the Laplace system function, H(s) for the system described by equation Equqtion.
A three-phase steam-turbine synchronous generator is connected to an infinite bus. The generator excitation current is IF=1000 A at the time of synchronization with the bus. The generator has a synchronous reactance of Xs =1.5 per unit.
A weather forecaster explains that there is 50% chance of rain on Saturday and a 50% chance of rain on Sunday. So what is the probability it will rain during the weekend
A typical lead acid storage battery has a mass of 30 kg. Starting from a fully charged state, it can supply 5 A for 24 hours with a terminal voltage of 12 V before it is discharged.
Calculate the current in the output of the source before and after the installation of the new device and The temperature sensor output is a voltage which is equal to the temperature sensed by the sensor. Design an electric circuit which can get th..
A temperature transducer has the relationship R=200 + 10T where R is in ohms and T is in Celsius. The problem specifications are: Range is 30=T=50°C Resolution is 0.01°C Frequencies of interest are 0 to 100Hz Transducer dissipation constant is 20 mW..
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