Just provide the answer:

34. In the formula F = q# X B: A) F must be perpendicular to but not necessarily to B B) F must be perpendicular to B but not necessarily to C) must be perpendicular to B but not necessarily to F D) all three vectors must be mutually perpendicular E) F must be perpendicular to both and B 35. The current is from left to right in the conductor shown. The magnetic field is into the page and point S is at a higher potential than point T. The charge carriers are: A) positive B) negative C) neutral D) absent E) moving near the speed of light 36. A uniform magnetic field is directed into the page. A charged particle, moving in the plane of the page, follows a clockwise spiral of decreasing radius as shown. A reasonable explanation is: @ 4 & @ particle @ o F @ @ @ & A) the charge is positive and slowing down B) the charge is negative and slowing down C) the charge is positive and speeding up D) the charge is negative and speeding up E) none of the above 31. Four circuits have the form shown in the diagram. The capacitor is initially uncharged and the switch S is open. 5 R Ania The values of the emf , resistance and R, and capacitance C for each for the circuits are circuit 1: =18V,R=3Q,C=1 4F circuit2: =18V,R=6Q, C=9 4F circuit 3: =12V,R=1Q,C=T7 4F circuit4: =10V,R=5Q,C="7 uF Rank the circuits according to the current just after switch S is closed least to greatest. A) 1,2,3,4 C 32. An electron is moving north in a region where the magnetic field is south. The magnetic force exerted on the electron is: A) zero B) up C) north D) south E) west 33. A magnetic field exerts a force on a charged particle: A) always B) never C) 1if the particle is moving across the field lines D) if the particle is moving along the field lines E) if the particle is at rest 29. The current in the 5.0-Q resistor in the circuit shown is: A) 0.42A B) 0.67A C) 1.5A D) 24A E) 3.0A 30. A charged capacitor is being discharged through a resistor. At the end of one time constant the charge has been reduced by (1 1/e) = 63% of its initial value. At the end of two time constants the charge has been reduced by what percent of its initial value? A) 82% B) 86% C) 100% D) between 90% and 100% E) need to know more data to answer the question 27. The equivalent resistance between points 1 and 2 of the circuit shown is: 10 10 3 1n 501 2 24 212 A) 25Q B) 4.0Q C) 5.00Q D) 6.5Q E) 16 Q 28. Each of the resistors in the diagram is 12 Q. The resistance of the entire circuit is: A) 58Q B) 25Q C) 48Q D) 120Q E) none of these