Practical Physics for Secondary Schools Fundamental Principles And Applications
Practical Physics for Secondary Schools Fundamental Principles And Applications
Newton Henry Black
The book Practical Physics for Secondary Schools Fundamental Principles And Applications was written by author Newton Henry Black Here you can read free online of Practical Physics for Secondary Schools Fundamental Principles And Applications book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Practical Physics for Secondary Schools Fundamental Principles And Applications a good or bad book?
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The north pole of the needle was deflected toward the west 272 PRACTICAL PHYSICS when the current flowed from south to north, as shown in figure 229, while a wire placed under the compass needle caused the north end of the needle to be deflected toward the east. 266. Magnetic field around a current. Inasmuch as the compass needle indi- cates the . Direction of magnetic lines of force, it is evident from Oersted's ex- periment that a current must set up a magnetic field at right angles to the co...nductor. To make this clear, the FIG. 229. Deflection of student may perform the following ex- magnetic needle by periment. Electric current. We will send a strong current down a vertical wire which passes through a horizontal piece of cardboard. To indicate the magnetic lines of force, we will sprinkle iron filings on the cardboard arid tap it gently while the current is jfy [ ^\ on. The filings ar- ~ ^--^ range themselves in concentric rings about the wire. By placing a small com- pass at various posi- tions on the board, we see that the di- rection of these lines of force is as shown in figure 230.
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