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Consider the two-pole motor shown in Figure 16.10 on page 778. The gap between the rotor and stator is 1.5 mm. Each of the two field coils has 250 turns and carries a current of 3 A. Assume that the permeability of the iron is infinite.
a. Determine the flux density in the air gap.
b. Each armature conductor carries a current of 30A and has a length of 0.5 m. Find the force induced in each conductor.
Consider a message signal m(t) containing frequency components at 100, 200, and 400 Hz. This signal is applied to a SSB modulator together with a carrier at 100 kHz, with only the upper sideband retained.
The average intensity of sunlight reaching the earth is 1390W/m2. A charge of 2.38 x 10-8 C isplaced in the path of this electromagnetic wave. What is the magnitude of the maximum electric force that the charge experiences
In the electronics business, mark-up is in the order of 100% to 130% at each level of middleman. Let's say that it is 100%. Let's further say that your product passes through three levels of middleman, that your product is produced in accordance
A certain element has a phasor voltage of V=86.6+j50 V and the current I= -2.5+j4.33 A. The angular frquency is 200rad/s. determine the value of C to two significant figures with appropriate units.
The diagram of FIGURE 2 shows a bi-directional opto coupler input interface circuit. When a supply voltage of 20 V is applied the LED carries a current and 2 V is dropped across it. Calculate the value of the LED current and the value of current t..
Assume that, in S, there is a constant magnetic field and no electric field. Show that E' = V cross B' in S'.
Consider a network with a driving-impedance Z. (1) Find expression for P and Q. (2) Find p(t) in terms of P and Q. (3) Suppose that the network is a series RLC. Interpret the result in part (2).
Two plane waves that are spatially and temporally coherent propagate in the x-z plane and intersect at an angle such that each wave makes an angle (please see the attached file) with the z-axis. The figure below shows the k-vectors associated with..
A wave is specified by y = 8cos2π(2t-0.8z), where y is expressed in micrometers and the propagation constant is given in μm-1. Find (a) the amplitude, (b) the wavelength, (c) the angular frequency, and (d) the displacement at time t=0 and z=4 μm.
consider a TSI for a system with four timeslots per frame. Draw a block diagram- it should have four 2-bit words, eight 8-bit words, and a 3-bit binary counter. Walk the TSI through three consecutive frames of incoming data.
your company assembles five different models of a motor scooter that is sold in specialty stores in the us. the
Using energy concepts, find the internal self inductance per unitlength of a loss-less, conductive solid wire of radius ρ. You may assume that the current is uniformlydistributed through the cross-section of the wire.
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