The following questions can be answered simply using one or more right-hand rule
ID: 1496539 • Letter: T
Question
The following questions can be answered simply using one or more right-hand rules. Your answer only needs to indicate if the direction is in the positive (or negative) x, y, or z direction (or no direction). Your explanation does not need to be long, but you must indicate what direction you point your gures, thumb, palm, etc in order to apply the right-hand rule correctly.
a. Conceptual Question: A proton travels in the positive x direction. A uniform magnetic field points in the negative y direction. What direction will the magnetic force exerted on the proton point? Please provide your explanation.
b. Conceptual Question: An electron travels in the negative z direction. A uniform magnetic field points in the positive y direction. What direction will the magnetic force exerted on the electron point? Please provide your explanation.
c. Conceptual Question: A current runs through a wire in the negative x direction. A uniform magnetic field points in the positive x direction. What direction will the magnetic force exerted on the current point? Please provide your explanation.
d. Conceptual Question: A positive charge travels through a uniform magentic field that points in the positive x direction. The charge has force exerted on it in the positive z direction. Assuming that the charge is moving perpindicular to the magnetic field, what direction is the charge moving? Please provide your explanation.
e. Conceptual Question: A current runs through a wire in the positive y direction. A uniform magnetic field exerts a force on the wire in the negative z direction. Assuming that the current runs perpindcular to the magnetic field, what direction does the magnetic field piont? Please provide your explanation.
f. Conceptual Question: A current runs through a wire along the y axis in the the negative y direction. The magentic field from the wire is observed at a point on the positve z axis. What direction does the magnetic field point? Please provide your explanation.
Explanation / Answer
a)
velocity of proton is along +x direction(i)
magnetic field is along -y direction(-j)
F=q*(VXB)
force direction is along -Z direction (-k)
b)
velocity of electron is along -z direction(-k)
magnetic field is along +y direction(+j)
F=q*(VXB)
force direction is along +x direction (i)
c)
current direction is along -x direction(-i)
magnetic field is along +x direction(+i)
F=i(LXB)
magnetic force becomes zero
d)
magnetic field is along +x direction(+i)
force is along +z direction(+k)
F=q*(VXB)
direction of velocity is along -y direction(-j)
e)
current is along +y direction(+j)
force is along -z direction(-k)
F=i*(LXB)
direction of magnetic field is along +x direction(i)
f)
current is along -y direction(-j)
field is along +z direction(+k)
F=i*(LXB)
direction of magnetic force is along -x direction(-i)
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