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A conducting sphere that carries a total charge of +25 µC is placed at the center of a conducting spherical shell that also carries a total charge of +25 µC as shown in the diagram. The conductors are in electrostatic equilibrium.
(a) Determine the charge on the inner surface of the shell.
µC
(b) Determine the total charge on the outer surface of the shell.
The "power cube" transformer for a portable CD player has an output of 4.5 V and 550 mA (both rms) when plugged into a 120 V/60 Hz outlet. What is the peak current in the primary coil
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