Question

Two long straight wires carrying a conventional current I are connected by a three-quarter-circular arc of...

Two long straight wires carrying a conventional current I are connected by a three-quarter-circular arc
of radius R. An electron is moving to the right with a speed of v as it passes through the center C of the arc, and at that
instant Lorentz force on the electron is zero.

a )What is the direction of the net magnetic field at the center of the arc?

b)What is the direction of the magnetic force on the electron?

c)If an electric field is also present in the region, what is the direction of this electric field to have a Lorentz force equals to zero on the electron?

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Answer #1

I A) Direction of magnetic field at Center (P) = Into the plane of paper (-²) (B) Freguetis = q (u +B) =filů XC-² ) = nix - :

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