Units of a magnetic field kg/C-s is correct or incorrect? An electron is moving

Question

Units of a magnetic field kg/C-s is correct or incorrect? An electron is moving north in a region where the magnetic field is south. The magnetic force exerted on the electron is In the formula F = qv x B: F must be perpendicular to both v and B. Correct or incorrect? The figure shows a uniform magnetic field B directed to the left and a wire carrying a current into the page The magnetic force acting on the wire is in direction A loop of current-carrying wire has a magnetic dipole moment of 5.0 Times 10^-4 A m^3. The moment initially is aligned with a 0.50-T magnetic field. To rotate the loop so its dipole moment is perpendicular to the field and hold it in that orientation, you must do work of (U = mu B = mu B cos Theta)

Explanation / Answer

1.

unit is correct

Using the formula

B = F/qV

unit of F = kg ms-2

unit of q = C

unit of V = ms-1

so B = (kg ms-2) / (C ms-1)

B = kg/c-s

2.

since the direction of motion of electron is parallel to the direction of magnetic field , hence magnetic force = 0

3.

correct.,

since F is the cross product of V and B , hence the direction of F is perpendicular to V and B both

4.

Using right hand rule , the direction comes out to be along positive y-direction

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