Andrews, Ernest John, 1863-, Howland, Howard Newell, 1865- joint author · New York, London, The Macmillan company · leaf 445
gnetism. Also testit by seeing how many iron filings it willpick up. Test the two ends for polarity bybringing it near the compass. Reverse the current and see what effectit has upon the poles. (2) Double the number of turns ofAvire around the bar and again test forstrength. Place the spool of No.… … ELECTROMAGNETIC INDUCTION 41 (3) Complete the circuit and place one pole of the .corein the iron filings, and see how many it will pick up.Break the circuit. Result ? (4) Grasp the magnet in your right hand with thefingers pointing in the direction of the flow of current,and see which pole is…
Physics
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