Recent content by lemaire

Homework Statement I know Theta1 and Theta2. I also know sin(Theta1) and sin(Theta2). I am being asked to find the uncertainty of sin(Theta1) and sin(Theta2). Homework Equations The Attempt at a Solution Should i use the error propagation rule here? if so, will the uncertainty of...

My question is this: we have at the left of Ampere's law B2piR. Is this R(radius) the circumference divided by 2pie?. If we set up a surface like a Gaussian surface, we have an inside radius which is half the original diameter of the wire(0.7/2).

Homework Statement You have 16 m of 0.7 mm diameter copper wire and a battery capable of passing 21 A through the wire. What magnetic field strength could you obtain at the center of a single circular loop made from the wire? Homework Equations Ampere's law The Attempt at a Solution I...

Homework Statement A 1.88 m long wire carrying 3.1 A is wound into a tight, loop shaped coil 0.05 cm in diameter. What is the magnetic field at its center? Homework Equations The Attempt at a Solution I use Ampere's law but i get the wrong answer. I think i did not set up the...

so which formula should i use in order to solve the problem.

Homework Statement In 2.2 µs, an electron moves 11 cm in the direction of a 0.07 T magnetic field. The electron's velocity components perpendicular and parallel to the field are equal. What is the length of its actual spiral trajectory and How many orbits about the field direction does it...

well i am using a web software and the response you and i agreed on is not the right one. In the picture, the current I comes from the left in the x-axis goes in a circular motion and continues in the x-axis again.

this is what i have: (mu_0IL)/(4pia2) with a being the radius and mu_0 being the permeability constant

well i can't find the right expression.

Homework Statement A single piece of wire is bent so that it includes a circular loop of radius a. A current I flows in the direction of the x-axis . Find an expression for the magnetic field at the center of the loop. Homework Equations The Attempt at a Solution This is a...

Homework Statement A piece of copper wire joins a piece of aluminum wire whose diameter is five times that of the copper. The same current flows in both wires. The density of conduction electrons in copper is 1.1 \times 1029 m-3 in aluminum it is 2.1\times1029 m-3. what is the drift speed...

Homework Statement I have an initial data of d= 0.012608, V = 320 volt, Q = 1.50e-8 and A = 1.25e-4. y = Qd/AV. what is Δy , the partial derivative of y with respect to d? Homework Equations The Attempt at a Solution

Homework Statement A thin plastic rod 15 cm long carries 4.2 nC distributed uniformly over its length. (a) If the rod is bent into a ring, find the potential at its center. (b) If the rod is bent into a semicircle, find the potential at the center (i.e., at the center of the circle of...

By "total charge" i assume you mean net charge. Therefore, the charge carried by each at equilibrium will be the addition of their charges before equilibrium?

so, what should be the charges of the two spheres once at equilibrium knowing the charge of each when they are not connected?