With explanation please Wednesday Homework Problem 10.7 The figure to the right

Question

With explanation please Wednesday Homework Problem 10.7 The figure to the right shows a conductor traveling with velocity The conductor is traveling through a magnetic field that is not shown. The potential difference between point A and point B is positive, AV >0. What is the direction of the magnetic field? Select One of the Following: (a) The magnetic field points to the right of the page. (b) The magnetic field points to the left of the page. (c) The magnetic field points out of the page. (d) The magnetic field points into the page. (e) The magnetic field points to the top of the page. (f) The magnetic field points to the bottom of the page.

Explanation / Answer

(1)
VAB > 0
Which means Potential at A > Potential at B.
This means there will be excess of electrons towards side B .

This is possible, when Magnetic Force will force them towards side B, therefore ,
Direction of magnetic Field :- Into the Page !!

Magnetic Flux, = B.A

Where A is Area of the loop,
Magnetic Flux, phi = r^2B

Correct option :- (c)

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