I double checked the problem in the book and it definitely states the switch was closed for 1h and then opened at a time t = 0s. I suppose it is possible there is a typo in the book (it apparently has many). However, correct or not, they proceed to solve it as stated and end up with those...
Homework Statement http://imgur.com/uLZdBJC
27. The switch has been closed for
about 1 h. It is then opened at the time defined as t 0 s.
a. Determine the time required for the current iL to drop to
10 μA.
b. Find the voltage VL at t 10μs
c. Calculate VL at t 5tau.
Homework Equations
So I...
Ya sorry the diagram was not explicit about the ground. Both ends are typical 3 prong Male/Female (respectively) plugs. The ground lead from the male plug, which plugs into the outlet, runs into and is attached to a grounding screw in the box. The same goes for the female plug which runs to the...
I am half way through my Electrical Engineering program and have only just started to learn about AC circuits and inductive loads but I did a little reading and went off to try a simple project on my on. A company I work for wanted a switch to turn off their large refrigerator for certain...
θ in the first equation would be the angle between the I*L vector and the B vector or the bar and the magnetic field so it should be 30 degrees?
For the second equation that would lead me to believe that because this equation originates from F_{b} = q \vec{v} \times \vec{B} it should come...
1. In the arrangement shown, a conducting bar of negligible resistance slides along
horizontal, parallel, frictionless conducting rails connected as shown to a 4.0-Ω resistor.
A uniform 2.5-T magnetic field makes an angle of 30° with the plane of the paper. If
L = 80 cm and the mass of the...
Thank you so much that totally led me in the correct direction. I took A'(t)=L'*W+W'*L which I substituted in the equation for Induced EMF then plugged in a time of 4 and came to the correct answer of 3.6mV.
1. A rectangular wire loop (length 60 cm, width 40 cm) lies completely within a
perpendicular and uniform magnetic field of magnitude of 0.5 T. If the length of the loop
starts increasing at a rate of 20 mm/s at time t = 0, while the width is decreasing at the
same rate, what is the magnitude...