a magnetic field goes from the top to the bottom of this page. what direction will a proton moving diagonally from the upper left to the lower right deflect? Assuming paper lies flat.
a.downward
b.upward
c.left
d.right
left
To determine the direction in which a proton will deflect when moving diagonally from the upper left to the lower right in the presence of a magnetic field going from the top to the bottom of the page, we can use the right-hand rule. The right-hand rule states that if you point your right thumb in the direction of the moving charged particle (in this case, the proton), and then curl your fingers in the direction of the magnetic field, the direction in which your fingers point represents the direction in which the proton will deflect.
In this case, if the magnetic field is going from top to bottom, you can curl your fingers downward (towards the bottom of the page) since the magnetic field goes in that direction. Then, if you extend your thumb from your left hand towards the right (indicating the proton's motion from the upper left to the lower right), your index finger would point towards you.
So, using the right-hand rule, we find that the proton will deflect towards you, which is perpendicular to the initial diagonal path.
Therefore, the correct answer is c. left.