21 May WHY DON’T BUILDINGS BLOCK RADIO WAVES AS COMPLETELY AS THEY DO VISIBLE LIGHT?
) An MRI technician moves his hand from a region of very low magnetic field strength into an MRI scanner’s 2.00 T field with his fingers pointing in the direction of the field. Find the average voltage induced in his wedding ring, given its diameter is 2.20 cm and assuming it takes 0.250 s to move it into the field. (b) Discuss whether this current would significantly change the temperature of the ring.
Question 2
Speakers in stereo systems have two color-coded terminals to indicate how to hook up the wires. If the wires are reversed, the speaker moves in a direction opposite that of a properly connected speaker. Explain why it is important to have both speakers connected the same way.
Question 3
Why don’t buildings block radio waves as completely as they do visible light?
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