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Consider a separately-excited dc motor. Describe the speed variation of the motor operating unloaded under the following conditions:
a. The armature terminal voltage is varied while the field current is held constant.
b. The field current is varied while the armature terminal voltage is held constant.
c. The field winding is connected in shunt directly to the armature terminals, and the armature terminal voltage is then varied.
For evaporation from a point source, derive the ratio between the film thickness, d and the maximum thickness, d0 on a substrate of radius, r. What is the ratio for a surface source
A random variable X has a variance of 9 and a statistically independent random variable Y has a variance of 25. Their sum is another random variable Z=X+Y. Without assuming that either random variable has a zero mean
1- Derive the transfer function of a third orderlow Pass Butterworth filter for a bandwidth of200 rad/sec. 2-Draw a simulation diagram for the design of this filter. Use integrators, amplifiers and summers.
A shunt regulator utilizing a zener diode with an incremental resistance of 5ohm is fed through an 82ohm resistor. If the raw supply changes by 1.0V, what is the corresponding change in the regulated output voltage
The counter should be designed using D flip-flops and using the state equation method. (No credit will be given if the circuit is designed using the excitation table method.) Draw the final logic diagram.
compute the diameter in centimeters of a steel rod an aluminum rod and a copper rod which can withstand a particular
Consider a circuit consisting of a sinusoidal source V s (t) = cos (t) u (t) volts connected in series to a resistor R and an inductor L and assume they have been connected for a very long time. Let r = 0Ohm and L = 1 H.
Question 3 Consider a silicon pn junction diode at room temperature with: EG = 1.1 eV VBI = 950 meV
The fourier transform of the triangular pulse x(t) is expressed as: X(w) = 1/w^2(e^jw - jwe^jw - 1) Use this information, and the time-shifting and time-scaling properties to find the fourier transform of the signal: y = x, -1
What are the filter gains for the stopband at the cut-off frequency and 500 Hz, and passband at 3000 Hz based on the plot of the magnitude frequency response. Print the highpass IIR filter coefficients and plot the frequency responses using MATLAB..
Find the current that flows in a silicon bar of 10-µm length having a 5-µm x 4-µm cross section and having free electron and hole densities of 105 / cm³ and 1015 / cm³, respectively, when a 1 V is applied end-to-end. Use µn = 1200 cm²/V·s and µp =..
Discuss the different analog-to-digital converter (ADC) types and configurations. What is the purpose of the ADC. How do you interface to the different configuration
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