Download B - Winnetonka AP Physics I

Self Check Quiz NROC Chap 13 Lesson 40:
__________
Name: _____________________ Score:
1. A particle with positive charge q = 3 x 10-6 C is at a distance of 1.5 x 10-2 m from a long vertical
wire that carries a current I = 5 A. The particle is traveling with a speed v = 1000 m/s perpendicular to
the wire and is moving away from the wire. What are the magnitude and direction of the force on the
particle?
a. 1.0 x 10-8 N radially away from the wire
b. 1.0 x 10-8 N radially towards the wire
c. 2.0 x 10-8 N radially away from the wire
d. 2.0 x 10-8 N parallel to, but in the opposite direction of the current flow
e. 2.0 x 10-7 N parallel to, and in the direction of the current flow
Answer: _____
2. A proton (charge 1.60 x 10-19 C and mass 1.67 x 10-27 kg) is moving with a velocity v = 2 x 105 m/s in
the positive z direction. A magnetic field of B = 1.25 x 10-1 T is pointing in the positive y direction.
Find the magnitude and direction of the force acting on the proton.
a. 4.00 x 10-15 N, in the positive x-direction
b. 4.00 x 10-15 N, in the negative x-direction
c. 1.60 x 10-19 N, in the positive z-direction
d. 1.60 x 10-19 N, in the negative z-direction
Answer: _____
3. The magnetic force experienced by a moving charged particle depends upon _____________.
I. The particle's charge
II. The particle's velocity
III. The magnetic field strength
a. III only
b. I and II only
c. I and III only
d. II and III only
e. I, II, and III
Answer: _____
4. Two parallel long, straight wires are 0.0040 m apart and carry currents of 5.0 A and 10 A,
respectively. Determine the net magnetic field midway between the wires. Take B as positive if it is
going into the page.
a. –5.0 x 10-4 T
b. 5.0 x 10-4 T
c. –1.0 x 10-3 T
d. 1.0 x 10-3 T
Answer: _____
5. What is the strength of a magnetic field produced at a distance of 5 cm from the midpoint of a 100 m
long wire carrying a current of 4.0 A?
a. 4.0 x 10-5 T
b. 2.0 x 10-5 T
c. 1.6 x 10-5 T
d. 1.0 x 10-5 T
Answer: _____
6. A straight wire with a current placed in a uniform magnetic field experiences a force that is
______________.
a. perpendicular to the current
b. perpendicular to the field
c. proportional to the size of the current
d. all of these
Answer: _____
7. The magnetic force on a charged particle moving in a magnetic field _______________.
a. is zero if the particle moves perpendicular to the field
b. is a maximum if the particle moves parallel to the field
c. acts in the direction of motion for a positively charged particle
d. depends on the component of the particle's velocity that is perpendicular to the field
Answer: _____
8. The path of a charged particle moving in a plane perpendicular to a uniform magnetic field
_______________.
a. is a straight line
b. is a circle
c. is a parabola
d. not enough information
Answer: _____
9. Two long, parallel wires with currents are placed in a uniform magnetic field. If the current in one
wire is doubled and the current in the other wire is halved, what happens to the magnitude of the force
between these two wires?
a. It is doubled.
b. It stays the same.
c. It is tripled.
d. It is quadrupled.
Answer: _____
10. A 1.0 m long wire is placed perpendicular to a magnetic field of strength 0.20 T. If the wire
experiences a force of 0.60 N, what is the magnitude of the current moving through the wire?
a. 2.0 A
b. 1.0 A
c. 3.0 A
d. 4.0 A
Answer: _____
11. A long, straight wire carries a current of 5.0 A. At what distance from the wire
is its magnetic field 5.0 x 10-5 T?
a. 0.020 m
b. 0.20 m
c. 2.0 m
d. 20 m
Answer: _____