P2 7. [1pt] The wire in the above figure (indicated by an X) carries a non-zero

Question

P2 7. [1pt] The wire in the above figure (indicated by an X) carries a non-zero current I which travels into the paper. North is up, East is right, etc. (Neglect any fields from other sources) (For each statement select T True, F False). If you think the first is true, and the rest false, please enter TFF. WARNING: you have only 4 tries! the rest false, please enter TFF WARNING you A) The magnetic field at p1 points north. B) An electron at rest at piwill feel zero magnetic force C) The magnetic field at p2 points into the page Submt All Answers Last Answer: FFT Answer Incorrect, tries 3/6.

Explanation / Answer

The equation for magnetic field due to current carrying wire is

B = uo i/ 2pi r

As the current is flowing in to the plane the magnetic field will be clockwise in direction

(a)Use the right hand rule. Point your thumb in the direction of I, your fingers will curl in the direction of B. It is south.

so it is false

(b)an electron at rest p1 will feel magnetic force so it is false

(c) False

so correct answer is

FFF

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