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A step down chopper is to be used to supply power from 600 overhead wire to commutator motor on a trolley bus . The motor may be modeled as a generated direct voltage in series with a resistance of .2? and inductance of 25mH. The frequency of the chopper is set at 500 Hz.1-When the bus is stopped , what should be the ON time of the chopper to provide a motor current of 150 A ?2-What is maximum possible generated voltage of the motor for which a current of 150 A can be supplied ?3-What is the average value of the supply current for the conditions of 1 and 2
A two port amplifier has been designed to match the source and load resistances Rin = 1k ohms, Rout = 16 ohms, A = 50dB. What is the amplitude of the input signal needed to deliver 1W to the 16 ohm resistor.
Dynamic RAM that must be given a refresh cycle 64 times per ms. Each refresh operation requires 150 ns. memory cycle requires 250 ns.
An alarm is powered by 120 VAC, and the on/off state of the alarm is controlled by an EM relay. Design the interface between a computer output port and the EM relay. The dropout voltage is 3.5 V, and the coil current needs at least 100 mA.
Design a second-order band-pass IIR filter with center frequency of 450 Hz when the sampling frequency is 2000 Hz. In order to ensure the filter stability set the poles at 0.96 radial distant from the origin
Suppose a standard single-phase transformer that has a rating of a 15 kVA, 600V/120V, 60 Hz is reconnected as an autotransformer to obtain 600 V primary to 720 V secondary voltage ratio.
A function must be defined or declared above the locations in the source code file from where it is called. We declare a function by writing a function declaration (which is a statement so it ends with a semicolon).
Write the verilog code for a circuit that counts the number of 1s in a byte. Write the verilog code using a structural approach based on four Half-Adders, two 2-bit adders and one 3-bit adder. Write the test bench code to test the design.
An infinitely long line charge (Pl= 21 PI nC/m) lies along the Z-axis. An infinte area sheet charge PS= 3nC/m^2 lies in the X-Z plane at a distance Y =10 m. a) Using Gauss' law find the field E due to the line charge.
A thin conducting wire of length 3w forms a planar equilateral triangle. A Direct current I flows in the wire. Find the magnetic flux density at the center of that triangle.
Determine the eigenvalues of the system: y1'=8y1-y2 y'2=y1+10y2 What is the stability of the critical point lambda(base)1=2+i2, lambda=2-i2, Stable and attractive
the CMRR of a differential votage amplifier is specified as CMRR >10³, its voltage gain is G=50. the two input voltage have values v1=10.3 and v2=10.1.
Sketch magnitude and phase responses (as linear gain versus digital frequencies) for each filter (use [0,π]). Indicate filter type. Find cutoff frequencies if sampling frequency in 30 kHz. Use 6 points only. Do not use MATLAB.
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