(Answered) Some pacemakers employ magnetic reed switches to enable

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Some pacemakers employ magnetic reed switches to enable doctors to change their mode of operation without surgery. A typical reed switch can be switched from one position to another with a magnetic field of 5.0 x 10^-4 T. What current must a wire carry if it is to produce a 5.0 x^-4 T field at a distance of 0.50 m? Express your answer using two significant figures.

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