If the magnetic field is located in the negative x-axis and the velocity is located in the negative y-axis, what will be the direction of the force if the moving charge is negative?
1. If the magnetic field is located in the negative x-axis and the velocity is located in the negative y-axis, what will be the direction of the force
if the moving charge is negative?
2. A beam of electrons moves at 5.0 × 105 ?⁄? through a uniform 4.0 T magnetic field directed along the positive y-axis. The velocity of
each electron lies in the yz-plane and is directed at 30.0° to the +y-axis. Find the force on an electron.
3. A flat surface with area 7.0 cm2
in a uniform magnetic field ?⃗ . The magnetic flux through this surface is +0.70 mWb. Find the magnitude
of the magnetic field and the direction of the area vector ? if the flat surface is tilted 50° to the horizontal.
4. A straight horizontal copper rod carries a current of 70.0 A from west to east in a region between the poles of a large
this region there is a horizontal magnetic field toward the northeast (that is, 60° north of east) with magnitude 2.30 T. Find the magnitude
and direction of the force on a 2.00 m section of rod.
5. Two protons move parallel to the x-axis in opposite directions at the same speed v=3.0 × 105 ?⁄?. At the instant shown, find the electric
and magnetic forces on the upper proton if the distance between the two protons is r=5.0 × 10−10 ?.
6. A copper wire carries a steady 50 A current to an electroplating tank. Find the magnetic field due to a 2.0 cm segment of this wire at a
point 2.3 m away from it, if the point ? is located in the xy-plane at 42° east of north.
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