ch09 - MULTIPLE CHOICE. Choose the one alternative that...

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Unformatted text preview: MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) The source of all magnetism is 1) _______ A) t i n y d o m ain s of ali gn ed ato ms. m o v ing electric charge. ferromagnetic materials. D) tiny pieces of iron. E) none of these 2) Like kinds of magnetic poles repel while unlike kinds of magnetic poles 2) _______ A) m a y a ttra ct or rep el. r epel also. attract. 3) Magnet A has twice the magnetic field strength of magnet B, and at a certain distance pulls on magnet B with a force of 100 N. The amount of force that magnet A exerts on magnet B is 3) _______ A) e x a c tly 10 0 N. at o r about 50 N. More information is needed. 4) Compared to the huge force that attracts an iron tack to a strong magnet, the force that the tack exerts on the magnet is 4) _______ A) e q u a lly hu ge. r el atively small. More information is needed. 5) When a bar magnet is broken in two as shown, each piece is 5) _______ A) a c t u a l l y s t ron ger tha n the ori gin al ma gn et. h al f a s strong as the original magnet. as magnetic as the original magnet. D) no longer magnetic. 6) Surrounding every moving electron is 6) _______ A) a magnetic field. B) an electric field. both of these D) none of these 7 ) Magnetism is due to the motion of electrons as they 7) _______ A) spin on their axes. B) move around the nucleus. both of these D) none of these ESSAY. Write your answer in the space provided or on a separate sheet of paper. 8 ) W h a t i s t h e c a u s e o f a mag netic field abou t a perm anen t mag net, and abou t a curr ent- carr ying wire ? MUL TIPL E CHO ICE. Choo se the one alter nativ e that best comp letes the state ment or answ ers the quest ion. An iron rod becomes magnetic when 9) _______ A) t h e n e t s p i n s of its ele ctr ons are in the sa me dir ect ion . p o si ti v e i o ns accumula te at one end and negative ions at the other end. its atoms are aligned having plus charges on one side and negative charges on the other. D) its electrons stop moving and point in the same direction. E) none of these 10) Several paper clips dangle from the north pole of a magnet. The induced pole in the bottom of the lowermost paper clip is a 10) ______ A) s o u th pole . n o rth pole. north or south poleno difference really. 11) An iron nail is more strongly attracted to the 11) ______ A) s o u t h pol e of a mag net. n o rt h pole of a magnet. north or south poleno difference really. 12) Magnetic domains normally occur in 12) ______ A) s i lver. ir on. copper. D) all of these E) none of these 13) Magnetic field lines about a current- carrying wire 13) ______ A) e x t e n d radi ally fro m the wire . c ir c l e the wire in closed loops. both of these D) neither of these...
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ch09 - MULTIPLE CHOICE. Choose the one alternative that...

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