Please include the steps to how you obtained the solutions, as I am not looking

Question

Please include the steps to how you obtained the solutions, as I am not looking simply for the answer but the thought process into how you obtained the solution, Thank you? 3) The lines of magnetic field produced by in the inside of a solenoid: (5 points) A. are in the direction of the current B. are opposite the direction of the current C. are parallel to the axis of the solenoid D. are perpendicular to the axis of the solenoid E. in circles around the axis of the solenoid 4) Three particles travel in a region of space where the O O O O magnetic field is out of the page as show in the figure to the below. The electric charge on each of the three o particles is? (5 points) A. 1-neutral, 2- negative, 3- positive B. 1- positive, 2- neutral, 3- negative C. 1- positive, 2- negative, 3- neutral D. 1- negative, 2- neutral, 3- positive 2

Explanation / Answer

3) C. are parallel to the axis of the solenoid.

curl your fingers in the direction of current in the solenoid, then your thumb indicates the direction of magnetic fields inside the solenoid.

4) D. 1-negtaive,2-neutral,3-positive

for third particle Apply, F = q*(v cross B)

take fingers in the direction of v and curl towards B, then thumb indicate the direction of magnetic force.

so, 3 must be poistive charge.

particle 2 is not deflected.so, it must be neutral.

particle to deflected opposite to particle 3.

so, it must be negative charge.

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