Download AP PHYSICS NAME: PROBLEM SET: CCWs in Magnetic Fields

AP PHYSICS
PROBLEM SET: CCWs in Magnetic Fields
NAME:
Solve the following problems on another sheet of paper. Answers are at the bottom of the page.
1. Draw the magnetic field lines around a straight section of wire carrying a current
horizontally left.
2. Draw the magnetic field lines around a straight wire carrying current that is moving
directly towards you.
3. Electric current is flowing through a copper wire.
a. What is the force per meter on the wire when carrying 9.8 A of current and is inserted
perpendicularly to a 0.80 T magnetic field?
b. What is the force is the angle between the wire and the magnetic field is 45o?
4. A 1.5 m length of wire carrying 6.5 A of current is oriented horizontally. At this point on
the Earth’s surface, the dip angle of the Earth’s magnetic field makes an angle of 40o to
the wire. What is the magnitude of the force on the wire due to the Earth’s magnetic field
of 5.5 X 10-5 T at this point?
5. How much current is flowing in a wire 4.2 m long if the maximum force on it is 0.900 N
when places in a uniform 0.0800 T field?
6. The force on a wire carrying 25.0 A is a maximum of 4.14 N when placed between the
poles of a magnet. If the pole faces are 22 cm in diameter, what is the approximate
strength of the magnetic field?
7. What is the magnitude of the magnetic field 1 m from a long straight wire carrying a
current of 1 A.
8. A 52 µC particle moves parallel to a long wire with a speed of 720 m/s. The separation
between the particle and the wire is 13 cm and the magnitude of the force on the particle
is 1.4 x 10-7 N. What is the current flowing through the wire?
1. See Instructor
5. 2.68 A
2. See Instructor
6. 0.753 T
3. a) 7.84 N b) 5.54 N 4. 3.45 x 10-4 N
7. 2 x10-7 T
8. 2.4 A