1. The Hall voltage across a conductor in a 5 mT magnetic field is 1.9 ? V. The
ID: 306339 • Letter: 1
Question
1. The Hall voltage across a conductor in a 5 mT magnetic field is 1.9 ? V. The same conductor. with the same current, is placed in a different magnetic field, and the voltage across the conductor is 2.8 ??. what is the strength of the second field? Justify your answer with an equation. See the notes for some guidance on the Hall effect. 2. A metal rod is placed across a pair of conducting tracks, and pulled in the positive direction with a velocity of 0.8 m/s. The tracks are 32 em apart, and there is a magnetic field normal to the plane of the tracks and the rod, pointing upwards, of strength 0.30 T Hint the information to solve this problem is near the end of the reading notes SY a) Caleulate the electromotive force E (a voltage)Explanation / Answer
solving 1st question
Vh = B.I / (nqt)
so Vh is directly proportional to B
V1/V2=B1/B2
B2=7.36 mT
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