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Point charge in a conducting shell. A point charge +q is located inside a very thin conducting spherical shell halfway between the center and the shell shown in Figure 5.46. Assume the conducting shell is at zero potential.
(a) Calculate the electric field intensity at the center of the sphere.
(b) What is the field outside the sphere?
(c) Plot the electric field intensity inside the sphere by plotting the field lines (approximate plot is sufficient).
1. The closed-loop transfer function of a system is T(s) = 11.1(s +18)/ ((s + 20)(s2 + 4s +10)) Plot the poles and zeros of this system and discuss the dominance of the complex poles. What overshoot for a step input do you expect
The nameplate on a 50-MVA, 60-Hz single-phase transformer indicates that it has a voltage rating of 8.0-kV: 78-kV. An open-circuit test is conducted from the low-voltage side, and the corresponding instrument readings are 8.0kV, 62.1A, and 206kW. ..
a. Sketch the spectrum of the sampled signal up to 20 KHz. b. Sketch the recovered analog signal if an ideal (brick wall) low pass filter with a cutoff frequency of 4 KHz is used to filter the sampled signal in order to recover the orig..
A BJT differnetial amplifier, biased to have re = 100 Ω and utilizing two 100 Ω emitter resistors and 5 kΩ loads, drives a second differential stage biased to have re = 50 Ω. All BJTs have β = 100. What is the voltage gain of the first stage
In lab, the instructor told us to build an inverter connected to a capacitor on the output and then view the results on the oscilloscope. What is the purpose of doing this even a t different frequencies
Assume a computer has a 16Kx18 memory, and each instruction can only occupy one memory location. How many bits should its PC have. How many different instructions could this computer have at most
A shunt dc motor has RA = 0.1-ohm and VT = 440 V. For an output power of 16.1 hp, nm = 1,213 rpm and IA = 103 A. The field current remains constant. Find the the rotational power loss in hp.
For a device with a failure probability of 0.02 when subjected to a specific test environment, use the binomial distribution to calculate the probabilities that a test sample of 25 devices will contain (a) no failures; (b) one failure; (c) more th..
A voltage source V = 119
A single phase cyclo - converter with mid point configuration is use for obtaining an output frequency of one third times the inputfrequency. Turn ratio from primary to upper secondary is 1/1 and tolower secondary is 1/2 .
the equation M (d^2 X(t)/dt^2)+ D dx(t)/dt+ k x(t)=f(t) a)Find X(s)/F(s). b)show pole zero-plot c)let f(t)=d(t). Find the initial value of x(t) using the initial value theorem. Find the final value of x(t) using the final value theorem.
A 3-phase squirrel cage motor has maximum torque equal to twicefull load torque. r2 =0.3 ohms and x2 =3ohms. Determine the ratio of starting torque to full loadtorque, if it is started by (a) Direct on line starter(b) star delta starter
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