In the formula for calculating the magnetic force on a moving charge: F rightarr

Question

In the formula for calculating the magnetic force on a moving charge: F rightarrow = q(v rightarrow times B rightarrow ) F rightarrow must be perpendicular to v rightarrow but not necessarily to B rightarrow. F rightarrow must be perpendicular to B rightarrow but not necessarily to v rightarrow . v rightarrow must be perpendicular to B rightarrow but not necessarily to F rightarrow. F rightarrow must be perpendicular to both v rightarrow and B rightarrow . All three vectors ( F rightarrow , v rightarrow , B rightarrow ) must be mutually perpendicular. Two long, straight, parallel wires carry current in the opposite direction Wire A and have differing magnitudes. The current in wire A is 2.0 Amps and downwards, while the current in wire B is 4.0 Amps and upwards. Which one of the following statements concerning this situation is true? Wire A attracts wire B with half the force that wire B attracts wire A. Both wires attract each other with the same amount of force. Both wires repel each other with the same amount of force. Wire A repels wire B with half the force that wire B repels wire A. Wire A repels wire B with twice the force that wire B repels wire A. A charged particle moves in a straight line through a region of space where a magnetic field is present. Which one of the following answers must is true? The magnetic field has a magnitude of 0 T. There is no component of the magnetic field perpendicular to the particle's velocity. There is no component of the magnetic field parallel to the particle's velocity. The particle feels the maximum magnetic torque due to the magnetic field. The particle is an electron. A segment of flexible current-carrying wire is exposed to a region with a uniform magnetic field, as shown below. The initial direction of the current in the wire is directly up (in the plane of the page). What direction of magnetic field B would create the bend shown below in the current-carrying wire? Out of the page. Into the page. Left. Right. Down.

Explanation / Answer

(1) d

(2) b

(3) b

(4) e

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