1.) A proton with charge +e is moving with speed v at 30 degrees angle to the di
ID: 1315716 • Letter: 1
Question
1.) A proton with charge +e is moving with speed v
at 30 degrees angle to the direction of the magnetic field B. Determine the magnitude and direction of the resulting force acting on the particle
a.) 0.87 qvB, in the same direction as the B field
b) 1/2 qvB, in a direction perpendicular to the plane (v,B)
c.) qvB, along the same direction as the velocity vector
d.) 3qvB, parallel to the plane (v,B)
2.) In which direction is a positive particle moving after entering the magnetic field on the figure? The direction of the magnetic field is marked with an X in the picture. Selelct the correct path: A, B or C?
A
B
C
ALL OF THE ABOVE
3.) Current I is flowing through a wire with the direction given in the picture. In which direction is the magnetic field pointing at the point P (P is marked with a X and it is in front of the wire) on the picture?
A.) tangent to the circumference and pointing toward the left
B.) tangent to the circumference and pointing toward the right
C. )upward as the current
D.) the magnetic field is entering the page
2.) In which direction is a positive particle moving after entering the magnetic field on the figure? The direction of the magnetic field is marked with an X in the picture. Selelct the correct path: A, B or C?
A
B
C
ALL OF THE ABOVE
3.) Current I is flowing through a wire with the direction given in the picture. In which direction is the magnetic field pointing at the point P (P is marked with a X and it is in front of the wire) on the picture?
A.) tangent to the circumference and pointing toward the left
B.) tangent to the circumference and pointing toward the right
C. )upward as the current
D.) the magnetic field is entering the page
Explanation / Answer
1) F = q*v*B*sin(30) = (1/2)*q*v*B
so the answer is b) 1/2 qvB, in a direction perpendicular to the plane (v,B)
2) from the flemings right hand rule the answer is C
3) B.) tangent to the circumference and pointing toward the right
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