Four wires running through the corners of a square with sides of length a, as shown in Fig. 19.41, carry equal currents I. Calculate the magnetic field at the center of the square in terms of I and a.
Answer to relevant QuestionsA 50-cm-long solenoid has 100 turns of wire and carries a current of 0.95 A. It has a ferromagnetic core completely filling its interior where the field is 0.71 T. Determine the (a) Magnetic permeability and (b) Relative ...A particle with charge q and mass m moves in a horizontal plane at right angles to a uniform vertical magnetic field B. (a) What are the period T and frequency f of the particle’s circular motion in terms of q, B, and m? ...A metallic plate is in the plane of this paper. A uniform magnetic field is perpendicular to the plane of the paper and creates a magnetic flux in the plate. Give the direction of the eddy currents in the plate (clockwise, ...(a) Explain why the maximum emf produced by an ac generator occurs when the flux through its armature coil is zero. (b) Explain why the emf produced by an ac gennrator is zero when the flux through its armature coil is at ...A student makes a simple ac generator by using a single square wire loop 10 cm on a side. The loop is then rotated at a frequency of 60 Hz in a magnetic field of 0.015 T. (a) What is the maximum emf output? (b) If she ...
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