PhyIIHW6 - will calculate here Answer in units oF N 003...

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hopkins (tlh982) – HW06 – criss – (4908) 1 This print-out should have 4 questions. Multiple-choice questions may continue on the next column or page – fnd all choices beFore answering. 001 10.0 points An electron in a vacuum is frst accelerated by a voltage oF 26300 V and then enters a region in which there is a uniForm magnetic feld oF 0 . 104 T at right angles to the direction oF the electron’s motion. What is the Force on the electron due to the magnetic feld? Answer in units oF N. 002 10.0 points Sodium ions (Na + ) move at 0 . 794 m / s through a bloodstream in the arm oF a person standing near a large magnet. The magnetic feld has a strength oF 0 . 26 T and makes an an- gle 67 . 1 with the motion oF the sodium ions. The arm contains 73 . 5 cm 3 oF blood (within the magnetic feld) with 2 . 29 × 10 20 Na + / cm 3 . IF no other ions were present in the arm, what would be the magnetic Force on the arm? (Note: In Fact, many oppositely charged ions also ±ow in the bloodstream, so the net Force is considerably smaller than the number you
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Unformatted text preview: will calculate here.) Answer in units oF N. 003 10.0 points A rectangular loop consists oF 308 closely wrapped turns oF wire and has dimensions . 48 m by 0 . 72 m. The loop is hinged along the y-axis, and its plane makes an angle oF 76 ◦ with the x-axis. A uniForm magnetic feld oF 0 . 51 T is di-rected along the x-axis and the current in the loop is 8 . 7 A in the direction shown. x y z 76 ◦ B = 0 . 51 T B = 0 . 51 T . 48 m 72 m i = 8 . 7 A What is the magnitude oF the torque ex-erted on the loop? Answer in units oF N · m. 004 10.0 points Because blood contains charged ions, moving blood develops a Hall voltage across the di-ameter oF an artery. A large artery with a diameter oF 1 cm has a ±ow speed oF 0 . 6 m / s. IF a section oF this artery is in a magnetic feld oF 0 . 3 T, what is the maximum possible potential di²erence across the diameter oF the artery? Answer in units oF mV....
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This note was uploaded on 09/03/2009 for the course PHY PHY 2049 taught by Professor Robertr.criss during the Fall '08 term at University of South Florida.

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