CT 32 17b A permanent bar magnet is broken in half Do the pieces attract or repel A Attract B Repel C Neither no net force 2 1 2 1 CT 32 17c At which point A or B is the magnitude of the magnetic field LARGER Setup 1 S N A S N Setup 2 S N B N S C Same both are 0 D Same both nonzero CT 32 1 A proton charge e sits at rest in a uniform magnetic field B that points to the right What is the direction of the force on the charge e A B 0 no force C into the page D Other B CT 32 3 A neg and a pos particle move with certain velocities in a constant uniform magnetic field which points to the right The particle moves directly left the particle moves directly up B The force on the particle due to the Bfield is A into page C 0 B out of page D right E left CT 32 3b A neg and a pos particle move with certain velocities in a constant uniform magnetic field which points to the right The particle moves directly left the particle moves directly up B The force on the particle due to the Bfield is A into page C 0 B out of page D right E left CT 32 4 A particle is released from rest in a region where there is a constant uniform E field and a B field shown below Which path will the positive particle follow Paths shown are in plane of page E B out A B C D will not move E other CT 32 6 A particle with initial speed vo moves perpendicular to a uniform magnetic field B into the page There is a tenuous gas in the region causing viscous drag The particle B A spirals in B spirals out CT 32 13 A particle with unknown charge q moves right with speed v It enters a region with uniform electric field up and uniform magnetic field out of the page It goes in a straight line The sign of q must be E A B C 0 D impossible to determine v B CT 32 13b Suppose the particle in the last question is a proton If the speed of the proton is increased it will A still undergo no deflection B deflect out of the plane of the page C stay in the plane of the page and deflect upward D stay in the plane of the page and deflect downward E None of these CT 32 8 A square loop of wire carrying current I is in a uniform magnetic field B The loop is perpendicular to B B out of the page What is the direction of the net force on the wire B A out of the page B into the page C D E 0 I CT 32 8c The same loop is now in a nonuniform field B B y where B y A y Here A is a constant The direction of the net force is z B stronger y B A C x B weaker D E net force is zero HL MT 1 What is the magnitude of the force on a vertical section of the loop A I a B B I c B C I B D I a c B E other HL MT 2 What is the magnitude of the torque on a vertical section of the loop A I a2 B B I c2 B C I acB D I acB 2 E other CT 32 18c What is the direction of the torque about the axis of rotation B A B C D E r F I axis CT 32 10 A long wire has a current What is the direction of the B field created by the wire just below the wire dL i r A B C D E other B 0i dL r dB 2 4 r CT 32 10b A long wire has a current What is the direction of the B field created by the wire just above B r A B C D E other L i 0i dL r dB 2 4 r CT 32 12b A half infinite line of ccurrent ENDS at the origin What is the B field at a point a distance x past the half wire right on the line of the wire I A Zero B 0 I x C 0 I 2 x D 0 I 4 x E 0 I 8 x B O x CT 32 12b The half infinite line of charge ENDS at the origin What is the B field at a point a distance x past the half wire right on the line of the wire I A Zero B 0 I x C 0 I 2 x D 0 I 4 x E 0 I 8 x B dL O r x 0i dL r dB 2 4 r CT 32 16 What is the direction of the B Field at point P A B C 0 D E Other CT 32 11 Which point A or B has the larger magnitude B field I I B A C Both are same HL BS 1 What is the magnitude of the vector r A tan 1 x2 y2 B sin 1 x2 y2 C x2 y2 D x y 2 2 E None of the these HL BS 2 What is sinq y A x 2 y 2 B x 2 y2 D Sin 1 y x 2 y2 x E Sin 2 2 x y 1 C y x x 2 y2 HL BS 3 What is dB A Zero B C D 0 dl I 4 R 3 0 dl I 4 R 0 dl I 2 4 R E 0 I dl 2 4 2 R CT 32 14 What is the direction of the Force acting i i on the Blue Wire F total iL B A Up B Right C Left D Into the Page E Out of the Page CT 32 14 What is the direction of the Force acting i i on the Blue Wire F total iL B A B C D E Up Right Left Into the Page Out of the Page B F CT 32 14b What is the direction of the Force acting on the Red Wire i i F total iL B A Up B Right C Left D Into the Page E Out of the Page CT 32 14c Two loops of wire have current going around in the same direction The forces between the loops is A Attractive B Repulsive C Net force is zero i2 i1 Second loop X B field HL AL 1 What is B dl A Zero D 0 I B 0 IR 2 E 0 I C 2 R 2 0 I ln R 2 CT 32 19 loop B dl 0iencircled We need a sign convention for i encircled Place the fingers of your right hand around the imaginary loop and your …
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