Recent content by D.B0004

I got the calculations from the website below. Not sure where else to find the solution to the problem. http://dev.physicslab.org/Document.aspx?doctype=3&filename=Magnetism_CurrentCarryingWires.xml

Homework Statement Two wires are placed parallel near each other in free space at a distance of d=0.08m. They have a length of L=0.4m and each carry a current of i=3.7A (in the same direction.) Find the force exerted on each other. Consider attraction as positive force and repulsion as a...

Homework Statement Consider the core of dimensions given in example 5-1. A coil requires an inductance of 23.6μH, a maximum current of 4A is allowed, and flux density is not to exceed 1.3T. Calculate the required relative permeability, μr, of the magnetic material that should be used. (HINT...

We were not given it. Maybe they just assume I could derive it? Not sure. But I think I see what you are saying. So rather than going to the Rm, I should just use Ri --> Ri = .031/2 Didn't derive it but that gives the right answer. Thanks.

Okay. Here are my steps 1) Find Rm = (0.01775)/4= 0.01775 2) Find H = Ni*I/(2*PI*Rm) = 42*8/(2IPI*.01775 = 3012.8 I forgot to put the I in my first answer. I don't see the importance of the "very close to the inside diameter" part and how that effects the equation.

Homework Statement I really think my answer is correct - could someone verify this or let me know where I went wrong? This is problem submitted online, the "correct" answer looks like my teacher accidentally hit the button 3 twice. PROBLEM: The toriod in example 5-1 from the textbook has an...

Homework Statement Please see attachment for circuit and parameters. Homework Equations i --> 90 phase angle for inductor so Z of inductor = 0.5<90 sum of voltages = 0 #<40 = #*cos(40) + i*sin(40)*# The Attempt at a Solution shteii01 - 100 + 0.5<90 + V2<theta = 0 --> 100 + 0.5*cos(90) +...

Homework Statement An inductive load is connected to a 120V (rms), 60Hz AC source. The load draws 5.0 kW at a power factor of 0.81 (lagging). You need to improve your power factor to 0.96 (lagging) by adding a capacitor. What is the Capacitance needed (in uF)? Homework Equations P/|S| =...

Homework Statement A vehicle having wheels with a diameter of 58cm, is powered by motors that have a maximum speed of 6024 rpm. Each motor is coupled to the wheel using a gear mechanism as shown in figure 2-14. Calculate the required gear ratio if the vehicle's maximum speed is 190.2 km/hr...

Here are equations listed below the figure.

This problem probably shouldn't be in the introductory section...but hey maybe someone will get it.

Wow and now I posted the WRONG PICTURE. Thought I only had one screen shot.

Im sorry. I completely forgot to add those! See file attached.

Homework Statement In the system of Problem 2-6, we need move the load by 20 degrees and bring the system to rest. Assuming a triangular speed profile of the load with equal acceleration and deceleration rates (starting and ending at zero speed). Assume a coupling efficiency of 100%. The...

Wow. I feel like an idiot. Got it. Thanks.