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Modern electrical machines are based on the interactions of two rotating magnetic fields. Could we design a machine based on the interactions of rotating electric fields?
If so, draw a possible three phase motor that is based on two rotating electric fields and explain 1) the basic principle; 2) the drawback of the electric field based machine when it is compared to magnetic field based machines
Design a simple BJT amplifier circuit for receiving the over-the-air HDTV signals. The circuit should have a voltage gain of 10-100, assuming your signal source (antenna) is connected to amp through a cable with an impedance of 75
An ideal voltage source produces a dirac delta function, an impulse spike to a series resistor, capacitor combination. R = 10.000 ohms, C = 0.039 uF. Calculate the initial voltage that the capacitor charges to at t = 0+.
While both triangular and sawtooth waveforms work in a PWM modulator, it does affect the phase of the PWM output and being able to control this can be useful. Consider your resistor and capacitor choices for the 555 timer circuit.
a) What is the velocity of the particle b) If this velocity is known to within 0.2% accuracy, what is fx of the position that particle? Assume that the mass of the particle is 2 x 10-26 kg.
An infinitely long wire is placed in a space with relative permeability of 9000 carrying current of 1.9 A in the +y direction. What is the magnitude of the magnetic flux density at (0.03,0,0) [meters] in units of Tesla
GaAs LED emitting surface size is 180 um by 180 um. The doping levels are NA = 9 E+15 cm-3 and ND = 5 E+17 cm-3. The n-layer is 70 um thick, and the p-layer is 8 um thick.
We will weigh objects by a strain gauge or R = 120 Ohms, GF= 2.02 mounted on copper column of 6-in. diameter. Find the change in resistance per pound placed on the column. Is this change an increase or decrease in resistance
A three-phase overhead transmission line has a per-phase resistance of 0.15 ohm/km, and a per-phase inductance of 1.3263 mH/km.
calculate the convolution (x1[x]*x2[k]) for the following pairs of sequences: a-) x1[k]=u[k+3]-u[k-2] and x2[k]=u[k+5]-u[k-4] b-) x1[k]=0.5^k u[k] and x2[k]=cos Pi*k u[-k]
Write an instruction sequence to set bits 3, 2, 1, and 0 of memory location at $1000 to 1 and leave the upper four bits of the same locations unchanged. use hcs12/9s12 to program.
Two data streams are coming serially to a system. These two streams are carefully observed and if considering any three bits from each stream, we observe that these two input streams are equal ; the FSM gives a signal to an alarm system.
You have a bandwidth of 10 MHz (per direction) in a single-cell system and want to deploy a wireless telephone system. You have the following options: analog 30-kHz channels (as in AMPS)
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