MasteringPhysics Assignment Print View

# MasteringPhysics Assignment Print View - HW 05 Due: 11:00pm...

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HW 05 Due: 11:00pm on Friday, March 11, 2011 Note: To understand how points are awarded, read your instructor's Grading Policy . [Switch to Standard Assignment View ] Magnetic Force on Charged Particles Conceptual Question For each of the situations below, a charged particle enters a region of uniform magnetic field. Determine the direction of the force on each charge due to the magnetic field. Part A Determine the direction of the force on the charge due to the magnetic field. Hint A.1 Determining the direction of a magnetic force Hint not displayed ANSWER: points into the page. points out of the page. points neither into nor out of the page and . . Correct

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Part B Determine the direction of the force on the charge due to the magnetic field. Hint B.1 Determining the direction of a magnetic force Hint not displayed ANSWER: points out of the page. points into the page. points neither into nor out of the page and . . Correct Part C Determine the direction of the force on the charge due to the magnetic field. Note
that the charge is negative. Hint C.1 Effect of a magnetic field on a negative charge Hint not displayed ANSWER: points out of the page. points into the page. points neither into nor out of the page and . . Correct Magnetic Force on a Current-Carrying Wire Learning Goal: To understand the magnetic force on a straight current-carrying wire in a uniform magnetic field. Magnetic fields exert forces on moving charged particles, whether those charges are moving independently or are confined to a current-carrying wire. The magnetic force on an individual moving charged particle depends on its velocity and charge . In the case of a current-carrying wire, many charged particles are simultaneously in motion, so the magnetic force depends on the total current and the length of the wire . The size of the magnetic force on a straight wire of length carrying current in a

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uniform magnetic field with strength is . Here is the angle between the direction of the current (along the wire) and the direction of the magnetic field. Hence refers to the component of the magnetic field that is perpendicular to the wire, . Thus this equation can also be written as . The direction of the magnetic force on the wire can be described using a "right-hand rule." This will be discussed after Part B. Part A Consider a wire of length = 0.30 that runs north-south on a horizontal surface. There is a current of = 0.50 flowing north in the wire. (The rest of the circuit, which actually delivers this current, is not shown.) The Earth's magnetic field at this location has a magnitude of 0.50 (or, in SI units, ) and points north and 38 degrees down from the horizontal, toward the ground. What is the size of the magnetic force on the wire due to the Earth's magnetic field? In considering the agreement of units, recall that . Express your answer in newtons to two significant figures.
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## This note was uploaded on 04/25/2011 for the course PHYSCS 2760 taught by Professor Bercili during the Spring '10 term at Missouri (Mizzou).

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MasteringPhysics Assignment Print View - HW 05 Due: 11:00pm...

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