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The dielectric constant of LiF is 9.27 at low frequencies and approaches 1.9 at high frequencies. What are the percentage contributions of electronic and ionic polarization to the low-frequency polarization? Which ion contributes most of the electronic polarization?
A 75 hp, 60 Hz, 2300 V, 20 A, 2 pole, wye connected, design B induction motor with code K delivers rated horsepower at 3500 r/min. Assume the phase angle of the locked-rotor impedance is 75 degrees.
The phasor voltage across a certain load is V = 1200√2
The current through R is to be measured using an ammeter. Find the current in R with and withought ammeter for a. R=50 b. R=5 c. R=0.5 The ammeter resistance is 5 ohm.
Show that the Hall coefficient for a p-type semiconductor is R_H=1/pe where p is the hole concentration and e is the electron charge. Assume the current is along the +x direction, the magnetic field is along the +z direction, and the Hall electric..
Design a Common Emitter amplifier with no bypass capacitor to obtain a voltage gain of -10 when Rin= 2k, Rload= 4k, VCC= 15V, VBE= 0.6V, and beta= 300. This amplifier requires an output swing of 4V peak-to-peak.
Indicate the closest value to the change in decibels of the received signal for the given parameter change. The distance between transmitter and receiver for a one-way communication path is halved.
Compute the amount of time required to deliver 10 frames to the receiver with stop-and-wait flow control. Assume that all frames and ACKs are received correctly.
The four alkaline batteries cells store a total of 200 Watt-seconds of energy. If the cassette player is drawing a constant 10mA from the battery pack, how long will the cassette operate at normal power
a. What is the memory layout of the 16-bit value, 0x7654 in a big-endian 16-bit machine, and a little-endian 16-bit machine b. What would the layouts be in 32-bit machines
Give an example of an RC circuit whose transient behavior cannot be modeled by having a function generator with square wave output replacing the mechanical switch.
Two LTIC systems have impulse response functions given by h1(t)=(1-t)[u)t)-u(t-1)] and h2(t)=t[u(t+2)-u(t-2)].a) Carefully sketch the functions h1(t) and h2(t). b) Assume that the two systems are connected in parallel.
A buck-boost converter works with an input voltage of 12 V and switching frequency 10 kHz. The load resistance of 24 Ω requires doubled input voltage. The inductor and capacitors are 1 mH and 100 μF, respectively.
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