






Study with the several resources on Docsity
Earn points by helping other students or get them with a premium plan
Prepare for your exams
Study with the several resources on Docsity
Earn points to download
Earn points by helping other students or get them with a premium plan
Community
Ask the community for help and clear up your study doubts
Discover the best universities in your country according to Docsity users
Free resources
Download our free guides on studying techniques, anxiety management strategies, and thesis advice from Docsity tutors
Material Type: Exam; Professor: Mryasov; Class: Generl Physics W/Calc II; Subject: PH-Physics; University: University of Alabama; Term: Fall 2009;
Typology: Exams
1 / 11
This page cannot be seen from the preview
Don't miss anything!
Name: ________________________ Class: ___________________ Date: __________ ID: A
Multiple Choice Identify the choice that best completes the statement or answers the question.
____ 1. Determine the current in the 10-V emf.
a. 2.3 A b. 2.7 A c. 1.3 A d. 0.30 A e. 2.5 A
____ 2. What is the potential difference V b − V a shown in the circuit below.
a. −8.0 V b. +8.0 V c. −18 V d. +18 V e. −12 V
Name: ________________________ ID: A
____ 3. Determine the magnitude and sense (direction) of the current in the 500-Ω resistor when I = 30 mA.
a. 56 mA left to right b. 56 mA right to left c. 48 mA left to right d. 48 mA right to left e. 26 mA left to right
difference V a − V b?
a. −30 V b. 30 V c. 5.0 V d. −5.0 V e. −1.0 V
Name: ________________________ ID: A
charged. Which light bulb(s) is(are) dimmest?
a. A b. B c. C d. A and B e. All three are equally bright (or dim).
____ 8. Which two circuits are exactly equivalent?
a. A and B b. B and C c. C and D d. D and E e. B and E
Name: ________________________ ID: A
____ 9. A 2.0-C charge moves with a velocity of (2.0 i + 4.0 j + 6.0 k ) m/s and experiences a magnetic force of (4.0 i − 20 j + 12 k ) N. The x component of the magnetic field is equal to zero. Determine the y component of the magnetic field. a. −3.0 T b. +3.0 T c. +5.0 T d. −5.0 T e. +6.0 T
km/s in the positive x direction at a point where Bx = 5.0 T, B (^) y = −4.0 T, and B (^) z = 3.0 T? a. 2.8 N b. 1.6 N c. 1.2 N d. 2.0 N e. 0.4 N
____ 11. The figure shows the orientation of a rectangular loop consisting of 80 closely wrapped turns each carrying a
m, b = 0.30 m, and I = 8.0 A, what is the magnitude of the torque exerted on the loop?
a. 2.5 N ⋅ m b. 1.5 N ⋅ m c. 3.1 N ⋅ m d. 2.7 N ⋅ m e. 0.34 N ⋅ m
Name: ________________________ ID: A
____ 15. The segment of wire (total length = 6 R ) is formed into the shape shown and carries a current I. What is the magnitude of the resulting magnetic field at the point P?
a.
b.
c.
d.
e.
____ 16. Two long parallel wires are separated by 2.0 cm. The current in one of the wires is three times the other
greater of the two currents? a. 2.0 A b. 1.0 A c. 3.0 A d. 9.0 A e. 1.5 A
____ 17. A hollow cylindrical (inner radius = 2.0 mm, outer radius = 4.0 mm) conductor carries a current of 24 A parallel to its axis. This current is uniformly distributed over a cross section of the conductor. Determine the magnitude of the magnetic field at a point that is 5.0 mm from the axis of the conductor. a. 0.96 mT b. 1.7 mT c. 0.55 mT d. 1.2 mT e. 0.40 mT
____ 18. A conducting rod with a square cross section (3.0 cm × 3.0 cm) carries a current of 60 A that is uniformly
(1.5 cm × 1.5 cm) if the path is centered on the center of the rod and lies in a plane perpendicular to the axis of the rod?
Name: ________________________ ID: A
____ 19. A solenoid consists of 100 circular turns of copper wire. Parts of three turns, A, B and C, are shown below.
When a current flows through the coil, a. both A and C are repelled by B. b. A is attracted to B; C is repelled by B. c. neither A nor C is attracted to or repelled by B. d. A is repelled by B; C is attracted to B. e. both A and C are attracted to B.
____ 20. Two parallel and coaxial current loops of radius a are placed a distance L apart. The current in each ring circulates in the same direction. At a point on the axis half way between the loops the magnetic field in T has magnitude a. 0.
b.
4( a^2 + L^2 ) 3 / 2^
c.
2( a^2 + L^2 ) 3 / 2^
d.
( a^2 + L^2 ) 3 / 2^
e.
____ 21. An ideal solenoid of radius a has n turns per unit length and current I. The magnetic flux Φ B through any circular area of radius a inside the solenoid, centered on and perpendicular to the solenoid axis is
2 4
nI.
2 2
nI.
e. 0.