Question

Spring 2019 JSU Physics 212 Test 38 Name l Number L. A negatively charged particle travels to magnetic field lines within a region of space. W one of the following ing statements concerning the force exerted on the particle is true? Answer a) The force is directed perpendicular to the magnetic field b) The force accelerates the particle c) The force slows the particle. d) The force is perpendicular to the direction in which the particle is moving e) The force has a magnitude of zero newtons field that is in the negative y 2. A proton moves in the negative x direction, through a uniform magnetic f Answer direction. The maghetic f A) in the negative x direction B) in the positive y direction C) in the negative y direction D) in the positive z direction 3. At a distance R from a curent carrying wire, what is the direction of the magnetic field relative to the nswer wire? a) radially toward the wire b) radially away from the wire c) parallel to the wire d) in the direction opposite to that of the current e) in the direction that is perpendicular to both the wire and to the radial direction 4. Two parallel wires have currents that have the same direction, but differing magnitude. The current in wire A is i; and the current in wire B is 2i. Which one of the following statements concerning this Answer situation is true? a) Wire A attracts wire B with half the force that wire B attracts wire A. b) Wire A attracts wire B with twice the force that wire B attracts wire A c) Wire A repels wire B with half the force that wire B attracts wire A. d) Both wires attract each other with the same amount of force. e) Wire A repels wire B with twice the force that wire B attracts wire A. 5. A coil of wire with N turns and area A is placed into a magnetic field of magnitude B. The angle of the normal to the plane ofthe coil sat an angle ф with respect t the magnetic field. According the Faraday's law which of the following changes will produce an emf in a coil of wire? a) B is increased b) A is increased Answer c) φ is increased d) any of the above choices e) none of the above choices 6. Consider the situation shown. A triangular, aluminum loop is slowly moving to the right. Eventually

Answer 1

1) option E

Force will be zero because magnetic force exist only when magnetic field and velocity makes an angle other than 0° between them.

2) option D

q*(V X B)

3) option E

4) option D

5) option D

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