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x Search Texlbook Solutior x Clectricity -> C Apps D secure https://elearning utdallas.edu/bbcswebdav/pid-18271 37-dt-content-rid-14209169 1/users/paulmac/2126/04.0%20Electricity%20119620.pdf PaymenlsExarn P: Probability! ::: 3 18 A flow of size f leaves the positive terminal of the battery and deflects the compass needle on the right of the diagram. This flow continues to point Q. Compass needles at the positions just above bulbs D and bulb E are deflected by a smaller amount than the compass needle closest to the positive terminal of the battery. The compass needle closest to the negative terminal of the battery deflects by the same amount as the compass needle closest to the positive terminal of the battery. What can you infer about the flow at each of the four compass positions? What is happening to the flow at points P and Q? 12] Type here to search A E 10:49 AM 2/13/2018Explanation / Answer
The flow (current) f is divided at the point Q as per Kirchhoff's current law. So flow in D & E is less than f .But the flow in the conductor near the -ve terminal is the same f as in the +ve terminal .
As the magnetic field in a current carrying conductor is directly proportional to the current through it (Biot-Svart Law) , the magnetic field near the conductor with larger current is greater than that near the one carrying smaller current. Thus the magnetic needle deflects more near the larger current carrying conductor than the smaller one. Hence the manetic needle near the +ve & -ve terminal deflects by the same amount ,where as ner the bulb D & E deflects less.
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