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A 6-pole, dc armature with 36 slot and 2 coilsides per slot is to be wave-wound (doublelayer). Calculated the back-pitch, front-pitch and commutator-pitch. How many dummy coils, if any, are required? Draw the developed diagram of the winding and show the locations of brushes and the distance between them in terms of commutator segments. If
(a) 2 brushes are used, and
(b) 6 brushes are used.
Compare the power contained in the sidebands to the total power in the modulated signal. What is the power efficiency in this AM scheme and calculate the PEP supplied by the AM transmitter - Write an expression for the normalized modulating signal.
Five resistors are in series with a 20 V source. The voltage drops across four of the resistors are 1.5 V, 5.5 V, 3 V, and 6 V. How much voltage is dropped across the fifth resistor?
The ends of the three faces form a closed triangle. Explain clearly why this implies that dA1+ dA2+dA3= 0.
If a given modulation method A requires higher Eb/No ratio for a given probability of error compared with another modulation method B, is method B better than method A or not, and why
A manufacturer specification sheet lists the transfer function of a pressure sensor as 45±5% mV/kPa with a time constant of 4±10%. A highly accurate test system applies a step change of pressure from 20 kPa to 100 kPa.
A signal, bandlimited to 1Khz, is sampled by multiplying it with a rectangular pulse train with repetition rate 4KHz and pulse width 50 μs. Can the original signal berecovered without distortion, and if so, how
What are the air and gas outlet temperatures. After extended operation, deposits on the inner tube surfaces are expected to provide a fouling resistance of R'f = 0.004 m2 · K/W. Should operation be suspended in order to clean the tubes
A charge Q is uniformly distributed over the wall of a circular tube of radius b and height h. Determine V and E on its axis at a point outside the box.
Determine the panel orientation you would choose to obtain maximum energy: (a) Over the year (b) In the summer (c) In the winter Discuss your choice of slope angles if the location is at 75°N.
In the digital communication link the data rate is 500 kb/s. The modulator generates the binary FSK signal. a) Determine the transmitted bandwidth if the difference between two frequencies fc1 - fc0 = 300 kHz
A box contains resistors whose values are independent and areuniformly distributed between 100 and 120 ohms. If two resistorsare selected at random and connected in series, find a. the most probable value of resistance for the series combination
Determine the time constant of the circuit. - Write the mathematical equation for the voltage vC following the closing of the switch.
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