# Lect15 - B d I enclosed B oI Bd I B d B 2 R 2 R !...

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Unformatted text preview: B d I enclosed B oI Bd I B d B 2 R 2 R ! " " " " # " # " # For which loop is Bdl the greatest? A. Case 1 B. Case 2 C. Same For which loop is Bdl the greatest? A. Case 1 B. Case 2 C. Same For which loop is Bdl the greatest? A. Case 1 B. Case 2 C. Same An infinitely long hollow conducting tube carries current I in the direction shown. \$ X X X %% X " # What is the direction of the magnetic field inside the tube? A. clockwise B. counterclockwise C. radially inward to the center D. radially outward from the center E. the magnetic field is zero I into screen B d I enc &% ' B d o I enc dl dl B B dl B &% ' B d o I enc B dl dl B dl B &% ' B d B o I enc dl B dl B dl !" '( % !# % "! ! #\$ ! \$& !# # ! \$ ) A B C * + ! !, A B \$! % ! #! & # !! # # . \$ ! \$# !\$ " "! ! # "! ( \$# " \$ ) ( / ! ! #! !"# !# # . !" \$# # ! !" !# !# ! #! # " # " # # # ! #! 0 0 B d o I enc 2 1 B d 3 2 B d o nLI + 4 3 B d 1 4 B d o nI o I enc BL 0 0 0 o I enc BL " * B 12 # #" # # ! # 3 4'4 !#\$ # !% ## # "! % y % " # !# !" ( , 3 x 5 6 !# 7 7 6! '" # # # # !# % ! ! 8 # !# ' ! # ! # !# 9 ! . ! !0 B d o I enc B d 5 6 9 9 9 o I enc # ' "! : : :% ;% /! !# # < \$ \$ !# , 12 !% y 3 ! x ! 4'4 !!- - "! : ) B d o I enc 0 so B 0 8 9 8'9 86 9 12 !% y 3 ! 4'4 !!- - "! ;% ) ! x B d o I enc 3 8 9 8'9 86 9 12 ! 4'4 !!- - "! ;% ) !% dl y 3 ! x B d Bd B d B 2 r B I enclosed B oI I 2 r 8 9 8'9 86 9 * 12 !% y 3 !# ! ) # # =8 < 9 # ! x 8 9 j I b2 8'9 j I b 2 a 2 86 9 j I b 2 a 2 j = I / area area j I b 2 b2 a2 a 2 12 !% y 3 ! 4'4 !!- - "! : :% ) ! x 8 9 8'9 86 9 12 ! 4'4 !!- - "! : :% ) !% o jAenc y 3 B d oI enc B 2 r ! x B 2 r o I (b 2 a 2 ) (r 2 a ) 2 B I (r 2 a 2 ) o 2 r (b 2 a 2 ) * # ! # # 8 9 8'9 86 9 12 # #" # # ! # 3 4'4 !#\$ # ## # "! , " # !# !" ( !% % y % 3 x ! / ! ! >? # #" # % : :% !#\$ %! 3* . 2 #\$ ! '8 9 @ * ) # 3* ( y 3 & !" X ! # x & - . #. / . . & 0 1 2 - . #. / . . & 0 1 - . #. 3 . . & 0 1 1 - . #. 3 . . & 0 1 -4 # # # # # 2 " # 2 ! 5 " # ...
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