Question: Please help with these questions 17. A single loop generates a magnetic field B at the center. (a) Two loops will double the field. (b)

Please help with these questions

17. A single loop generates a magnetic field B at the center. (a) Two loops will double the field. (b) Three loops will triple the field. (c) Four loops will quadruple the field. (d) All of the above. 18. A proton enters a solenoid with velocity parallel to the magnetic field. (a) It will move in a straight line. (b) It will follow a helix. (c) It will move in a circle. (d) None of the above. 19. An electron enters a solenoid with velocity parallel to the magnetic field. (a) It will move in a straight line. (b) It will follow a helix. (c) It will move in a circle. (d) None of the above. 20. How will a moving electron differ from a moving proton in the same unform magnetic field? (a) They will not differ. (b) The proton orbit will have a bigger radius. (c) The electron orbit will have a bigger radius. (d) None of the above

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