Question

Magnetic Fields and Electromagnetism 143 ch equal 402. In which of the following cases would a uniform magnetic feld B exer the largest magnitude of force on a charged particle? (A) The charge is 3g and is placed stationary in the magnetic field (B) The charge is 2q and is moving at velocicy s directly along the magnetic held lines magnetic field line. of the magnetic field (C) The charge is g and is moving at velocity perpendicular to the (D) The charge is g and is moving at an angle of 60° to the direction 403. The coil in the illustration has an elecuric current moving in the direction hown. At which point is the magnetic field strongest? (A) in the exact center of the coil, midway from each end (B) midway from each end of the coil, closer to one edge of the coil (C) at the center of one end (D) The magnetic field has the same strength at every point inside the de etic coil 404. In the illustration, a positive charge is placed at rest in the middle of a uniform magnetic field that is directed into the page, in the-direction. What will be the direction of the subsequent motion of the charge the which (A) The charge will move upward on the page, in the ty direction. (B) The charge will move to the right, in the +x direction. (C) The charge will move into the page, in the - direction. (D) The charge will not move.

Answer 1

Force = Bqv sin(theta)

so for the all given combinations we can find the force and find out which one is the largest.

(a) velocity is zero so the force is zero

(b) parallel to the field line so the angle is zero ==> sin theta = 0 ==> force is zero

(c) charge q moving perpendicular will have force = Bv

(d) with 60 degrees angle = Bv sin(60) = 0.866 Bv

so the Option -C is the correct answer.

I can only answer the first question as HOMEWORKLIB's policy.

However the answers are

403. Same magnetic field throughout the coil ==> Option - D

404

Charge placed at rest so it will not experience any force ==> Option D

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