Phys 2426 Exam 3 Fall 2008 Practice

# Phys 2426 Exam 3 Fall 2008 Practice - Exam 3 Practice Exam...

This preview shows pages 1–3. Sign up to view the full content.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Exam 3- Practice Exam Phys 2426 Fall 2008 Name___________________________________ You may use a pencil, eraser, calculator and three 4 x 6 inch hand written index cards. You may obtain extra paper from the instructor if needed. Staple any extra sheets to the back of the exam. k e =(1/4 ΔΉ o ) = 8.99 x 10 9 Nm 2 /C 2 m e = 9.11 x 10-31 kg Ή o = 8.85 x 10-12 C 2 /Nm 2 m p = 1.67 x 10-27 kg e = 1.602 x 10-19 C MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Alpha particles (charge = + 2 e , mass = 6.68 × 10- 27 kg) are accelerated in a cyclotron to a final orbit radius of 0.60 m. The magnetic field in the cyclotron is 0.10 T. The period of circular motion of the alpha particles is closest to: A) 2.6 μs B) 2.0 μs C) 1.3 μs D) 3.9 μs E) 3.2 μs Figure 27.1 2) In Fig. 27.1 is a velocity selector that can be used to measure the speed of a charged particle. A beam of particles is directed along the axis of the instrument. A parallel plate capacitor sets up an electric field E , which is oriented perpendicular to a uniform magnetic field B . If the plates are separated by 8 mm and the value of the magnetic field is 0.3 T, what voltage between the plates will allow particles of speed 5 × 10 5 m/s to pass straight through without deflection? A) 1200 V B) 3800 V C) 7500 V D) 190 V E) 380 V 1 Figure 27.6 3) In Fig. 27.6, a wire segment 1.2 m long carries a current I = 3.5 A, and is oriented as shown. A uniform magnetic field of magnitude 0.50 T is present as shown. Right- handed coordinates are used. The magnetic force on the wire segment, in SI units, is closest to: A)- 1.1 j- 1.8 k B)- 1.8 j + 1.1 k C) + 1.1 j- 1.8 k D) + 1.8 j- 1.1 k E)- 1.1 j + 1.8 k Figure 27.7a 4) A rigid rectangular loop, which measures 0.30 m by 0.40 m, carries a current of 9.9 A, as shown. A uniform external magnetic field of magnitude 1.8 T in the negative x- direction is present. Segment CD is in the x- z plane and forms a 19° angle with the z- axis, as shown. In Fig. 27.7a, the y- component of the magnetic force on segment AB is closest to: A) + 1.7 N B) + 5.1 N C)- 5.1 N D)- 1.7 N E) zero 5) Ions having equal charges but masses of...
View Full Document

{[ snackBarMessage ]}

### Page1 / 8

Phys 2426 Exam 3 Fall 2008 Practice - Exam 3 Practice Exam...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online