4. There is a counterclockwise current / in a circular loop of wire situated in an external magnetic field directed out of the page as shown below. The effect of the forces that act on this current is to make the loop (A) expand in size (B) contract in size (C) rotate about an axis perpendicular to the page (D) rotate about an axis in the plane of the page (E) accelerate into the page 5. Which of the paths below represents the path of an electron traveling without any loss of energy through a uniform magnetic field directed into the page? х х х х в (A) A (B) B (C) C (D)D (E) E х х х х х Magnetic Field х х 7. A metal spring has its ends attached so that it forms a circle. It is placed in a uniform magnetic field, as shown below. Which of the following will NOT cause a current to be induced in the spring? (A) Changing the magnitude of the magnetic field (B) Increasing the diameter of the circle by stretching the spring (C) Rotating the spring about a diameter х х х х х х (D) Moving the spring parallel to the magnetic field (E) Moving the spring in and out of the magnetic field Spring х х х 8. A single circular loop of wire in the plane of the page is perpendicular to a uniform magnetic field B directed out of the page, as shown below. If the magnitude of the magnetic field is decreasing, then the induced current in the wire is (A) directed upward out of the paper (B) directed downward into the paper (C) clockwise around the loop (D) counterclockwise around the loop (E) zero (no current is induced)
4. There is a counterclockwise current / in a circular loop of wire situated in an external magnetic field directed out of the page as shown below. The effect of the forces that act on this current is to make the loop (A) expand in size (B) contract in size (C) rotate about an axis perpendicular to the page (D) rotate about an axis in the plane of the page (E) accelerate into the page 5. Which of the paths below represents the path of an electron traveling without any loss of energy through a uniform magnetic field directed into the page? х х х х в (A) A (B) B (C) C (D)D (E) E х х х х х Magnetic Field х х 7. A metal spring has its ends attached so that it forms a circle. It is placed in a uniform magnetic field, as shown below. Which of the following will NOT cause a current to be induced in the spring? (A) Changing the magnitude of the magnetic field (B) Increasing the diameter of the circle by stretching the spring (C) Rotating the spring about a diameter х х х х х х (D) Moving the spring parallel to the magnetic field (E) Moving the spring in and out of the magnetic field Spring х х х 8. A single circular loop of wire in the plane of the page is perpendicular to a uniform magnetic field B directed out of the page, as shown below. If the magnitude of the magnetic field is decreasing, then the induced current in the wire is (A) directed upward out of the paper (B) directed downward into the paper (C) clockwise around the loop (D) counterclockwise around the loop (E) zero (no current is induced)
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11th Edition
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Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Transcribed Image Text:4. There is a counterclockwise current / in a circular loop of wire situated in an external
magnetic field directed out of the page as shown below. The effect of the forces that
act on this current is to make the loop
(A) expand in size
(B) contract in size
(C) rotate about an axis perpendicular
to the page
(D) rotate about an axis in the plane
of the page
(E) accelerate into the page
5.
Which of the paths below represents the path of an electron traveling without any loss
of energy through a uniform magnetic field directed into the page?
х
х
х
х
в
(A) A
(B) B
(C) C
(D)D
(E) E
х
х
х
х
х
Magnetic Field
х
х
Transcribed Image Text:7. A metal spring has its ends attached so that it forms a circle. It is placed in a uniform
magnetic field, as shown below. Which of the following will NOT cause a current to
be induced in the spring?
(A) Changing the magnitude of the
magnetic field
(B) Increasing the diameter of the
circle by stretching the spring
(C) Rotating the spring about a
diameter
х
х
х
х
х
х
(D) Moving the spring parallel to the
magnetic field
(E) Moving the spring in and out of the
magnetic field
Spring
х
х
х
8. A single circular loop of wire in the plane of the page is perpendicular to a uniform
magnetic field B directed out of the page, as shown below. If the magnitude of the
magnetic field is decreasing, then the induced current in the wire is
(A) directed upward out of the paper
(B) directed downward into the paper
(C) clockwise around the loop
(D) counterclockwise around the loop
(E) zero (no current is induced)
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