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1. Taking the B-wave to be sinusoidal, derive the expression for flux/pole.
2. Write the expression for flux linkages of an N-turn coil if the B-wave is sinusoidal and rotating at synchronous speed w rad/s.
3. Draw the phasor diagram relating emf phasor to flux phasor.
4. Sketch the mmf wave of an N-turn coil carrying current i. Write the expression for its fundamental if i is sinusoidal. What kind of wave is this?
The excess charge in a certain medium decreases to one-third its initial value in 20s. (a) If the conductivity of the medium is10^(4)S/m, what is the dielectric constant of the medium(b) What is the relaxation time
Phosphorus atoms, at a concentration of 5*10^16 cm^-3, are added to a pure sample of intrinsic silicon. Assume the phosphorus atoms are distributed homogeneously throughout the silicon sample. What is the fraction by weight of phosphorus
The forward transmittances of unity feedback tracking systemsare given below. For each, find the type number of the system, the steady state error coefficients k0,k1, and k2 and the steady state errors to unit step ramp, and parabolic inputs.
Let a crappy voice channel occupy 1kHz. To ensure no interefence between channels due to nonideal bandpass filters add a 3.0kHz spacing between channels. How many simultaneous voice channels can you have if allocated a 87MHz bandwidth total
A current of 5A flows through a resistor connected in series with choke coil. It is supplied with 250 V , 50Hz supply . If potential difference across resistor is 125 and across choke coil is 200 volt .
Describe your design process, how you made decisions, trouble you had, changes you made to the design to make it work, how you figured out significant values (frequencies,etc).
A storage tank has a Diameter of 20ft and a height of 10ft. The output volumetric flow from this tank is given by fout(t)=2h(t) where h(t) is the height of the liquid in the tank. At a particular time the tank is at steady state with an input flow..
The number of students arriving at Mary's office hours is modeled as a Poisson random variable with an average of 1 student every 15 minutes. (a) What is the probability that no students arrive during office hours (3-5 PM)
Research paper on electricutions Minimum three pages (not including cover page). What are the common causative factors? What does data indicate? What are the effective proven corrective measures?
Design a 25 W Class B public address amplifier with one input that will operate off of a pair of batteries of equal voltages and provide a voltage gain of 100. Assume that available op amps have againbandwidth product of 1 MHz and can come within ..
Consider the circuit as shown below. If Vin peak voltage = 12V, Calculate the output voltage Vo. Open loop voltage gain of the Operational Amplifier A=10,000. The voltage drop across the diode is 0.7 V.
For both low input voltage and maximum load, what is the lowest output voltage you would find? Express the resulting changes in output voltage (for supply variation alone, load variation alone, and both together) both in absolute terms and as % ch..
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