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perpendicular to each other, as shown in the figure.
The loop in the xy - plane carries a current I_0while that in the
xz -plane carries a current 2I_0. The resulting magnetic field B
at the origin is
energy of positronium (which is a bound state of an electron and a positron) is
A hollow conducting sphere has inner radius of a and outer radius of b. If a charge of Q is located at its center and the hollow sphere has a net charge of + 30 . what is the charge distribution in the hollow sphere ?
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