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1.The controlled variable in a closed-loop system is the direction of a robot arm. Initially, it is at 50o; then it is commanded to go to 25o. What is the error when the arm position is at 15o?
2.A motor was measured to rotate (unloaded) at 500 rpm, with a 6-V input and 1000 rpm, with a 12-V input. What is the transfer function (steady state) for the unloaded motor in rpm/V?
3.In a certain system, an electrical heating element was found to increase the temperature of a piece of metal 7o for each amp of current. The metal expands 0.004 in./deg and pushes on a load sensor that outputs 1 V/0.003 in. of compression. What is the overall transfer function in V/amp.
4.Find the gain in decibels of an amplifier that has a straight gain of 7000?
5.Find the current in a ground loop that is 200 m long, has a wire resistance of 0.06 ohms/m, and has a difference of 4 V between grounds?
Explain the operation of sequential logic devices and evaluate the output waveform in relation to the clock for QA, QB and QC in the subsequent circuit and show the binary sequence represented by these waveforms
sketch the spectrum
A balacnced, three-phase, delta-connected load is supplied by a balanced, three-phase, wye-connected source over a balanced three-phase line. the source voltages are in abc phase sequence in which Van is 19.94
A purely inductive load of 10 ohms is connected to an ac source of 120 V (rms) through a half wave SCR circuit. a. If the SCR is triggered at 90 degrees, calculate the angle at the maximum instantaneous current.
1.How is crude oil formed ?How is it found/discovered ? 2.How is natural gas formed? (Start with plankton) and include crude oil formation.
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.
Two generators are connected in parallel to the same bus bar and each has an inductive reactance of 10% on rating. Generator 1 is rated 2,500 kVA and 2.4 kV, and generator 2 is rated 5,000 kVA and 2.4 kV.
A 345-kV, 3-phase transmission line delivers 100 MVA, 0.866 lagging, to a DELTA connected load. Calculate the following: a.) The total real and reactive power delivered to the load. b.) The real and reactive power per phase.
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
Convert both numbers to 4-bit values, take the 2's complement of 9 and add them. What happens to the carry out How does that compare with what happens when you subtract 8 from 9
Interpreting frequency domain signal spectrum to time domain, A spectrum analyzer is connected to an unknown signal. The spectrum analyzer displays the voltage level of signals in volts vertically and frequency horizontally.
Identify the bus types and the unknown variables of the power flow problem. Write the complete set of equations needed to solve the load flow problem.
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