4. Which of the following is a mathematically incorrect operation and why? a) gradient of a divergence b) curl of a gradient c) gradient of a curl d) divergence of a curl
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- 20 What is countertorque a measure of? PRACTICAL APPLICATIONS ou are working as an electrician in a large steel manufacturing plant, and Y in the of doing preventive maintenance on a large DC you are generator. You have megged both the series and shunt field windings and found that each has over 10 M2 to ground. Your ohmmeter, however, indicates a resistance of 1.5 2 across terminals S, and S,. The ohmmeter indicates a resistance of 225 N between terminals F, and F2. Are these readings normal for this type machine, or is there a likely problem? Explain your answer. processYou have developed an idea for using a poly Si surface‐ micromachined cantilever. Initially, you designed a process flow for creating this simple structure, and the process flow is detailed in the figure below. ( cross section view and top view)There are several critical errors with this process (things that won’t work or won’t produce the result). Please find the critical errors in this process flow and, where possible, suggest alternate approaches. Do not worry about the accumulation of errors, but rather treat each step assuming that the structure up to that step could be created.This structure is actually quite simple to make. Develop a simpler process flow and associated masks to create the final structure. Be sure to show cross‐sectional and planar views of all key steps in the process.What are interpoles, and what is their purpose?
- Explain the hysteresis that can be found in materials due to force, magnetic and electrical subjection (give an example on two different materials below) show and explain the hysteresis curves for these materials. 1)High carbon steel 2)Cast ironWhat are the primary dimensions of electric voltage (E)? (Hint: Make use of the fact that electric power is equal to voltage times current.) When performing a dimensional analysis, one of the first steps is to list the primary dimensions of each relevant parameter. It is handy to have a table of parameters and their primary dimensions. We have started such a table for you in which we have included some of the basic parameters commonly encountered in fluid mechanics.add to this table. You should be able to build up a table with dozens of parametersExplane for me how to solve the problem by the same steps as given , plese help
- 2. (a) Define Biot-Savart’s law with the equation. (b) Define Lenz’s Law.A triac can pass a portion of …………… half-cycle through the load a. neither positive nor negative b. both positive and negative c. only negative d. only positive1/ Suppose that there are two types of H.V.T.Ls operating at the same voltage and carrying the same current, but one of them with smooth shapewhile the other with standard shape. Which of them, you will choose? a. choosing the smooth one. b. choosing the standard one. c. choosing the one with hollow construction shape. d. all these answers are wrong. 2/ As the ambient temperature in crease the disruptive critical voltage of coron a is: a. Decreased b. Increased c. No effect d. All these answers are wrong. 3/ Using HV underground cable improvevoltageprofile and power factor in any loaded inductive electrical grid because. a. Due to its inductive power effect. b. Due to resistive Effect. c. Due to its capacitive power effect. d. All of the above answers are wrong.
- Consider a resistor and an inductor is connected in series with a battery. Drive anexpression for energy stored in the magnetic field of a current carryingconductor. Description: The topics of the question are discussed satisfactorily withsuitable expressions, figures, and appropriate illustrationswith high accuracy & clarity.I need the answer as soon as possible(c)[ device needs to connect to a Diesel generator which generates sinusoidal AC power at 16.67 Hz. The amplitude or RMS value of the generator output voltage is adjustable. The area of cross-section of the core is 0.035 m². What constraints, if any, must be imposed on the The magnetic device of the figure is designed to operate with 240 V(rms) at 50HZ. For operation in a remote mining site, the use of this device, or the generator, if the device must be connected to the generator. You may assume that the peak B field in the core must be limited to 1.1 T to prevent magnetic saturation.