A wire with a length of 0.5 meters is placed in a magnetic field of 1T in the +x

Question

A wire with a length of 0.5 meters is placed in a magnetic field of 1T in the +x direction. the magnetic force on the wire is 10 Newtons in - z direction. What is the current in the wire? 0 amps 20 amps in the-y direction 20 amps in the + x direction 20 amps in the + y direction 10 amps in the +x direction 20 amps in the -x direction A charge of +10 micro-coulombs is moving at 10 m/s in the + y direction. It is moving through a magnetic field of 0.25 T in the - x direction. What is the magnetic force acting on the charge? 25 micro-Newtons in the +y direction 25 micro-Newtons in the z direction 400 micro-Newtons in the direction 400 micro-Newtons in the -x direction 25 micro-Newtons in direction

Explanation / Answer

a)

use,

force F=I*L*B

10=I*0.5*1

==> current, I=20 A along +y direction

b)

use,

F=q*V*B

F=10*10^-6*10*0.25

F=2.5*10^-5 N along +z direction

F=25 micro-N along +z direction

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