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Test 3 Review Questions - Physics II | PHYS 251, Exams of Physics

Christian Brothers University (CBU)Physics

Material Type: Exam; Class: Physics II; Subject: Physics; University: Christian Brothers University; Term: Unknown 1989;

Typology: Exams

Pre 2010

Uploaded on 08/13/2009

koofers-user-z0m-1
koofers-user-z0m-1 🇺🇸

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Physics 251 Test 3 Name:
•Show all of your work.
•Read the entire exam before starting.
•Calculators are allowed on this exam.
1. An alpha particle with kinetic energy 3.0×10−11 Jenters a uni-
form magnetic field of 0.5 T. If the angle between the magnetic
field and the velocity is 45◦,
(a) what is the magnitude of the force exerted on the alpha
particle?
(b) what is the radius of the helical path traced by the particle?
(c) what is the magnitude of the change in kinetic energy of
the particle as it leaves the magnetic field?
pf3
pf4
pf5

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Download Test 3 Review Questions - Physics II | PHYS 251 and more Exams Physics in PDF only on Docsity!

Physics 251 Test 3 Name:

  • Show all of your work.
  • Read the entire exam before starting.
  • Calculators are allowed on this exam.
  1. An alpha particle with kinetic energy 3. 0 × 10 −^11 J enters a uni- form magnetic field of 0 .5 T. If the angle between the magnetic field and the velocity is 45 ◦, (a) what is the magnitude of the force exerted on the alpha particle? (b) what is the radius of the helical path traced by the particle? (c) what is the magnitude of the change in kinetic energy of the particle as it leaves the magnetic field?
  1. A long thin wire carries a current of 10 .0 A.

(a) What is the magnitude of the magnetic field vector at a distance of 5 .0 cm from the center of the wire? (b) If another wire carrying a current of 15 .0 A in the same di- rection is placed 10 .0 cm from the original wire, what is the force per unit length between the wires? (c) Is the force between the wires attractive or repulsive?

  1. Two long thin wires are arranged as shown below.

(a) What direction is the magnetic field between the wires? (b) If an electron is moving with a velocity of 3. 0 × 107 m/s to the right, halfway between the wires, what is the magnitude and direction of the force on the electron?

  1. A coaxial cable carries a current of 15 .0 mA. The direction of current flow on the inner conductor is into the page. The outer conductor has an equal amount of current in the opposite di- rection. Write an expression for the magnetic field between the conductors and outside the outer conductor.