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1. State Ohm's law for magnetic circuits.
2. Define magnetic reluctance.
3. Explain why a ferromagnetic material exhibits its typical B-H behaviour.
4. Explain the practical use made of magnetic saturation.
5. Explain the origin of magnetostriction noise in ferromagnetic materials.
A cylinder of iron of volume 8 x 10-3 m3 revolves for 20 minutes at a speed of 3,000 r.p.m. in a two pole field of flux density 0.8 Wb.m2.- find the temperature rise of iron.
Why we can't store AC in Batteries instead of DC.or Can we store AC in batteries instead of DC?
A shunt-connected motor delivers an output power of 24 h p at 1200 rpm while operating from a source voltage of 440V and drawing IL = 50A. The resistances are RA = 0.05 Ω and RF +Radj = 100 Ω. Find the developed torque and efficiency of the motor.
A triangular loop is placed in the x-z plane. Assume that a dc current, I = 2A ,flows in the loop and that B = 30az mWb/m exists in the region. Find the forces and the torque on the loop.
A 13,800/480 V three-phase Wye-Delta-connected transformer bank consists of three identical 100-kVA 7967/480-V transformers. It is supplied with power directly from a large constant-voltage bus.
How to solve for equations for A and phi potentials using coulomb and lorentz guage And then also how to show that the electromagnetic fields obtained by using both these gauges is the same
Build and test the operational amplifier summing circuit you designed for the Prelab using 741-type op-amps. Use VA = 2 V and VB = 3 V with power supply rails of ±18 V. Ask your lab instructor to give the correct pin-out of the 741 if necessary.
In addition, there are two 20 A, single-pole breakers protecting branch circuits supplying 277V lighting circuits. Is this panel classified as a power panelboard or an appliance and branch circuit panel-board.
There are many ways to solve each one of the suggested problems. Each one of the projects will consist of the following majorsteps:- Dynamic modeling (showing full steps of finding governingequations)
a six sigma black belt found that in a random sample of 140 printed circuit boards, 18 are defective. At the 5% level of significance, test that the percentage of defective boards is 10% against the alternative which is greater than 10%.
A voltage divider provides a voltage of 1 Volts. Design a circuit that uses one or more op-amps so that the 1 volt is amplified by 7.
A60-Hz induction motor is needed to drive a load at approximately 850 rpm. How many poles should the motor have? What is the slip of this motor for a speed of 850 rpm?
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