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Electron Looping!
Consider the orbiting electron as a current loop. What is the current?
Proton in a Helical Path!
Calculate the radius of the resulting helical path.
A Circuit and a Mass!
Determine the direction of the current in the circuit and its value between points \(a\) and \(b\)
Crossed Cables!
Find the magnitude and direction of the total magnetic field at points A, B, C, and D.
Current in a Ring!
Find the magnitude and direction of the magnetic field at the center of the ring.
Nucleus Moving in Circles!
What is the magnitude and direction of the magnetic force acting on the moving nucleus?
Pulsating Direct Current!
Find the period of oscillating current in an electric circuit.
Reaching the Other Plate!
Find the maximum \(h\) at which the proton barely reaches the other plate.
Six Loops Move in a Field!
Find the electromotive force that is generated on each of these loops.
Three Cables!
Using Ampere's law, find the expression for the magnetic field generated by the wires.
Torque on a Square Loop!
Calculate the net force and torque that the magnetic field exerts on the loop.
A Bar Moving within a Field!
Find the induced electromotive force (emf) in the circuit.
Guiding a Proton!
If you want to use a uniform magnetic field to make the electron always move in a straight line in what direction should the magnetic field go?
Two Rotating Bars!
Find the maximum current that the bars can tolerate before losing electrical contact with the surface.