Hello all,
How exactly do you all cope with getting sick during a school term? For example, if you were to have a flu? Do you continue studying, or do you take a break to get well? I have been doing absolutely nothing these last two days because my head won't let me. I did however finish a math...
Homework Statement
Canada Post accepts international parcels whose (Length+Girth) is less than or equal to 2 meters, and Length is less than or equal to 1 meter. Girth is defined as the cross section. We wish to ship a parcel of the shape of a triangular prism of length l meters. The cross...
Homework Statement
Hello,
I was wondering if anyone could confirm my work for the following graph:
I'm supposed to find the rms for 1 complete cycle (0, 10ms)
The time constant is 1ms.
Charging phase, v=1-e^(-t/1ms)=1-e^(-1000t)
discharging phase, v=e^(-1000t)
The Attempt at a...
Homework Statement
My question pertains to taking the average over a particular period that is composed of 2 functions. For example, from [0, 5ms] the function is defined by 1-e^(-t/1ms)and then by e^(-t/1ms) from [5ms, 10ms].
Will the average from 0-->10 simply be the following...
Homework Statement
Hello all,
I encountered this practice problem for my midterm tomorrow involving the gradient operation.
Let (r, θ) denote the polar coordinates and (x, y) denote the cartesian coordinates of a point P in the plane. A function is defined via f(P)=xsinθ away from the origin...
Homework Statement
A zener diode D1 is specified to have Vz=3.8V and a knee current of 100 microamps. It is used as a shunt regulator where the minimum load resistance is 6.2k. What is the minimum power source that ensures that the shunt regulator remains regulated?
Homework Equations...
Homework Statement
I just have a question regarding "estimating" the value of a function at a given point. Say we have a function f(x, y, z, w) and we want to know the value of that function at f(1.99, 1.001, 8.02, 2.01)
Can we simply do the following:
let f=f(2, 1, 8, 2) and...
Homework Statement
Here is the picture:
I have an upcoming test, and I cannot seem to get any questions like this one. Help is greatly appreciated.
I calculated the net force, such that Fnet=ma. There exists a magnetic force due to the current in the wire. The mass m is negligible, ie...
Homework Statement
Couple questions regarding the following image:
What is meant when the problem states that "steady state can be achieved"? Will current be induced in this set up due to the acceleration to the right? For example, would I go Fg1-Fg2-Ffriction= Fmagnetic, and from there...
Homework Statement
Quick question. If you were to find the Thevenin's equivalent circuit between the terminals of an inductor, and thus calculated the time constant using Rth, would the time constant be same as if you were to not?
Same question for capacitor circuits
Homework Statement
The Attempt at a Solution
Just was hoping someone here would be able to help me with the circuit above. I wanted to ensure that I analyzed it properly.
I applied Ohm's Law to determine the initial current through the inductor. i(initial)=-16V/2.2kΩ=-7.27 mA...
Hello all,
I'm looking for some suggestions for textbooks regarding electromagnetism. I want something that goes in depth and really provides the concepts required to actually understand electricity and magnetism. Any Electrical Courses that I am taking are all circuit analysis....
Regards, D...
Hello all,
I was considering switching from my current degree of Computer Engineering to Electrical Engineering with a Minor in Physics (with a focus on materials science). Reason for the switch is I am much more interested in the hardware of electronic devices, as opposed to the software...
If we know the inductance of an iron-cored coil to be 200mH, and we remove the iron core such that the core is now air, how exactly can we determine what the new inductance is with just this information?
I played around with the equation for inductance, however, I could not seem to get it...
Homework Statement
http://www.mathhelpforum.com/math-help/attachments/f6/22423d1317129472-curvature-torsion-untitled.png [Broken]
The Attempt at a Solution
What I did was I calculated the unit vector for dN/ds={.21i+0.91j-0.42k}/ sqrt(.21^2+.91^2+0.42^2)=.205i+0.889j-.4102k...
Homework Statement
Consider the 20cm square loop of rigid wire shown in the figure. The wire has a diameter of 3mm and is lying flat on a table made of paramagnetic material. A uniform magnetic field of B=0.6 rans parallel to the table top as pictured. Electrical connection to the thick...
As the title states, I am looking for recomendations, and explanations as to why it was a good book. Some current suggestions I have had is by Robert L. Boylestad. Thanks in advance!
Homework Statement
I'm working on a particular problem that involves the force on a face of a triangular prism under water. What I am wondering is if someone could explain how to find dA for the prism? If the prism is an equilateral triangle, then dA=\sqrt3dy doesn't it? My book is showing...
Homework Statement
A square plate with edge a cm and areal density kr g/cm^2, where r is the distance (in centimetres) from P to one of the diagnals of the square.
Find the mass.
The Attempt at a Solution
I know my diagram is wrong, and I know what the correct one looks like. However, I...
So for each of the figures I want to find the Thevinin equivalent resistance and voltage. I also want to find the maximum power dissipated by a load resistor placed between points a and b on all three figures. Finally, I want to know what Vab is when a 7-olm resistor is placed between a and b...
Consider the following circuit.
Using superposition determine a) the magnitude and b) the direction of the current going through R_1 (is it away from node a?). Dtermine the c) magnitude and d) direction of the current through R_2 (is it away from node b?). e) Find V_{ab}.
a) First, I will...
Homework Statement
Find the current through the resistor R1.
The Attempt at a Solution
First I short circuited the voltage source and determined I1.
I1=(9A)(10-olms/18-olms)=5 A down
Next, I short circuited the current source and determined the current going through R1 via olms...
Homework Statement
Essentially I am pursuing clues as to what I should do in order to clean up the following circuit: .
I'm kind of confused regarding the portion where it says "no contact". Help?
What would happen if you just hook up a battery to itself, and a ground? I understand resistance is negligible in wires when there are other resistors, however, this doesn't seem to be the case when this occurs. But what happens? Battery drains extremely fast ?
I have found that I only need to brush up on my coceptual grasp of work and electrical applications. I have found that I am having negative answers when indeed the answer is positive. My question to you is, if I am following q(Vb-Va)=-W, I am assuming this is the work done by the field, and the...
Homework Statement
The Attempt at a Solution
What I am wondering is if I found all of the answers for figure 1, wouldn't I just be repeating those same answers for figure 2 and 3? Or is the way it arranged important?
Here are the values I found:
Vc1=1.51V
Vc2=1.61V
Vc1c2=-0.1V...
Homework Statement
The Electric Potential on an XY plane is described by the relationship V=2x^2-2y^2. Consider ONLY values in the range [0, 5].
A) Depict on an XY plane three lines of equal potential V=-4V, 0V and 4V. Consider 5 ponts. X= 0, 1, 2, 3, 4, 5.
B) Consider one point where x=...
Homework Statement
\intx^2tan^{-1}xdx
The Attempt at a Solution
\int{x^2tan^{-1}xdx}
\int{x^2tan^{-1}xdx} = \frac{x^3}{3}tan^{-1}x-{\frac{1}{3}}\int \frac {x^3}{1+x^2}dx
let {}u=1+x^2, \frac{du}{2}=xdx
\frac{x^3}{3}tan^{-1}x- \frac{1}{6}\int (1-1/u)...
Homework Statement
I am pursuing conceptual help regarding electric field due to uniformly charged planes.
Homework Equations
E=\frac{\sigma}{2\epsilon}
The Attempt at a Solution
I understand that a capictor has plates that are +/-Q. However, how would you calculate the elctric...
Homework Statement
In fair weather, over flat ground, there is a downward electric field of about 150 N/C. A) assume that the Earth is a conducting sphere with charge on its surface. If the electric field just outside is 150 N/C pointing radially inwards, calculate the total charge on the...