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Chapter 29: Q. 18 (page 831)
A small, square loop carries a current. The on-axis magnetic field strength from the loop is . What is the edge length of the square?
The edge length is
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What are the magnetic fields at points a to c in FIG URE EX29.12? Give your answers as vectors.
What is the line integral of between points i and f in FIGURE EX29.21?
At what distance on the axis of a current loop is the magnetic field half the strength of the field at the center of the loop? Give your answer as a multiple of R.
FIGURE EX29.37 is a cross section through three long wires with linear mass density 50 g/m. They each carry equal currents in the directions shown. The lower two wires are 4.0 cm apart and are attached to a table. What current I will allow the upper wire to 鈥渇loat鈥� so as to form an equilateral triangle with the lower wires?
An electron in a cathode-ray tube is accelerated through a potential difference of , then passes through the wide region of uniform magnetic field in FIGURE. What field strength will deflect the electron by ?
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