 | Newton Henry Black - 1913 - 142 páginas
...the poles. Compare these results with what might be expected from the thumb rule for a coil. Gfrasp the coil with the right hand so that the fingers point...poles stronger or weaker than before ? How do you know ? (c?) Wind the two sides of the U-shaped piece of iron with a wire carrying a current, in such a way... | |
 | Dugald Caleb Jackson, John Price Jackson - 1919 - 684 páginas
...current flowing in a coil of wire makes a magnetic solenoid of the coil. TO DETERMINE ITS POLARITY, grasp the coil with the right hand so that the fingers...current in the coil, and the thumb will point to the north-seeking pole of the coil. The magnetic effect of a solenoid is enormously increased by a soft... | |
 | Newton Henry Black, Harvey Nathaniel Davis - 1922 - 590 páginas
...it convenient to express the thumb rule as used -for a straight wire, in another way, as follows : THUMB RULE FOR A COIL. Grasp the coil with the right...the thumb will point to the north pole of the coil (Fig. 333). The strength of an electromagnet depends on the product of the strength of the current... | |
 | Frederick Edmund Sears - 1922 - 684 páginas
...A solenoid with an iron core is an electromagnet. 14. TO DETERMINE THE POLARITY OF AN ELECTROMAGNET Grasp the coil with the right hand so that the fingers...current in the coil and the thumb will point to the north-seeking pole of the magnet. 15. AMPERE TURNS The strength of an electromagnet is sometimes stated... | |
 | Newton Henry Black - 1923 - 264 páginas
...number of turns in the coil? Fig. 88. Coil carrying current. > v-^ ii -ir*t (6) Make a helix (Fig. 88) by wrapping the wire say fifty times around a lead...the thumb will point to the north pole of the coil. III. Electromagnet, (a) Make an electromagnet by putting a large iron nail or bolt inside the helix.... | |
 | Frederick Edmund Sears - 1927 - 588 páginas
...the direction of the lines of force about the wire. 8. TO DETERMINE THE POLARITY OF AN ELECTROMAGNET Grasp the coil with the right hand so that the fingers...current in the coil and the thumb will point to the north-seeking pole of the magnet. 9. AMPERE TURNS CHAPTER XXII MEASUREMENT AND EFFECTS OF ELECTRIC... | |
 | William Henry Timbie - 1937 - 608 páginas
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 | William Henry Timbie - 1937 - 592 páginas
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 | William Henry Timbie - 1939 - 666 páginas
[ Lo sentimos, el contenido de esta página está restringido. ] | |
 | 1941 - 556 páginas
[ Lo sentimos, el contenido de esta página está restringido. ] | |
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Compare these results with what might be expected from the thumb rule for a coil. G-rasp the coil with the right hand so that the fingers point in the direction of the current in the coil, and the thumb will point to the north pole of the coil. 
