Physics: A negative charge is moving across a rook from south to north. A magnetic field runs from East to west. In what direction is the magnetic force on the moving negative charge? A. Toward the East B. Toward the west C. Toward the floor D. Toward the ceiling

A negative charge is moving across a rook from south

Ответ:

kendrawalraven

28.01.2022

Physics

The magnetic force on the moving negative charge is towards the ceiling.

Explanation:

The magnetic force acting on a wire is given by the relation as follows :

$F=q(v\times B)$

q is charged particle

v is velocity of charged particle

B is magnetic field

In this case, a negative charge is moving across a rook from south to north. A magnetic field runs from East to west.

q = -q

v =+j

B = -i

So,

$F=-q(vj\times B(-i))$

Since, $j\times i=-k$

So,

$F=q(v\times B)(-k)$

So, the magnetic force on the moving negative charge is towards the ceiling.

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Ответ:

themagnuswhite

11.04.2021

Physics

The centripetal force that keeps the proton in circular orbit is provided by the Lorentz force exerted by the magnetic field:
$m \frac{v^2}{r} = qvB$
where m is the mass of the proton, v its speed, q its charge and B the magnetic field intensity.
By re-arranging the formula, we have:
$r= \frac{mv}{qB}$

Using B=0.66 T and $v=6.46 \cdot 10^5 m/s$ , we find the radius of the proton's orbit:
$r= \frac{(1.67 \cdot 10^{-27}kg)(6.46 \cdot 10^5 m/s)}{(1.6 \cdot 10^{-19}C)(0.66 T)}=9.8 \cdot 10^{-3}m=9.8 mm$

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A negative charge is moving across a rook from south to north. A magnetic field runs from East to west. In what direction is the magnetic force on the moving negative charge? A. Toward the East
B. Toward the west
C. Toward the floor
D. Toward the ceiling

Ответ:

Ответ:

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