A positive particle (a proton) with charge 1.6.10-19C is moving with a velocity v=2.105 m/s in the positive z direction. A magnetic field B = 125.10-3 T (kilo teslas) is pointing in the positive y direction . Find the force acting on the particle.
A. 4 x 10-15 N, in the positive x-direction
B. 4 x 10-15 N, in the negative x-direction
C. 1.6 x 10-19 N, in the positive z-direction
D. 1.6 x 10-19 N, in the negative z-direction
E. zero
Two parallel wires carry currents of I1 = 20 - A and I2 = 10 -A, respectively, in the opposite direction and have length of 5 m each. The distance between wires is d = 1 cm. Find the force between the wires.
A. zero
B. 0.01 N, attraction
C. 0.01 N, repulsion
D. 0.02 N, attraction
E. 0.02 N, repulsion
Two circular coils of equal radius 2 cm are placed several centimeters apart. If viewed from left, the current in the closer loop is clockwise and decreasing with time at a constant rate. Describe the direction of the current in the furthest loop.
A. clockwise
B. counterclockwise
C. oscillating
D. zero
E. depends on the distance between coils
A particle with positive charge 3.10-6 -C is a distance 1,5.10-2 -m from a long straight wire that carries a current 5 -A. The particle is traveling with speed v = 1000 m/s perpendicular to the wire. What are the direction and magnitude of the force on the particle if it is moving away from the wire? (in N)
A) 1.0.10-8 up
B) 1.0.10-8 down
C) 2.0.10-8 up
D) 2.0.10-8 down
E) 2.0.10-7 up
Fuente:
NJIT Physics Department
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