magnetism7-18

magnetism7-18 - TYPICAL NUMERIC QUESTIONS FOR PHYSICS I...

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TYPICAL NUMERIC QUESTIONS FOR PHYSICS I REGULAR QUESTIONS TAKEN FROM CUTNELL AND JOHNSON MAGNETISM (3) Science concepts. The student knows forces in nature. The student is expected to: (D) demonstrate the relationship between electricity and magnetism; (F) identify examples of electrical and magnetic forces in everyday life. 1. Which one of the following statements concerning permanent magnets is false? A) The north pole of a permanent magnet is attracted to a south pole. B) All permanent magnets are surrounded by a magnetic field. C) The direction of a magnetic field is indicated by the north pole of a compass. D) Magnetic field lines outside a permanent magnet originate from the north pole and end on the south pole. E) When a permanent magnet is cut in half, one piece will be a north pole and one piece will be a south pole. 2. Which one of the following statements concerning the magnetic force on a charged particle in a magnetic field is true? A) It is a maximum if the particle is stationary. B) It is zero if the particle moves perpendicular to the field. C) It is a maximum if the particle moves parallel to the field. D) It acts in the direction of motion for a positively charged particle. E) It depends on the component of the particle's velocity that is perpendicular to the field. 3. Complete the following statement: The magnitude of the magnetic force that acts on a charged particle in a magnetic field is independent of A) the sign of the charge. B) the magnitude of the charge. C) the magnitude of the magnetic field. D) the direction of motion of the particle. E) the velocity components of the particle. Page 1
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4. A charged particle is moving in a uniform, constant magnetic field. Which one of the following statements concerning the magnetic force exerted on the particle is false? A) It does no work on the particle. B) It increases the speed of the particle. C) It changes the velocity of the particle. D) It can act only on a particle in motion. E) It does not change the kinetic energy of the particle. 5. A proton traveling due east in a region that contains only a magnetic field experiences a vertically upward force away from the surface of the earth. What is the direction of the magnetic field? A) north B) east C) south D) west E) down 6. A charged particle is fired from a gun with a velocity of 5.2 × 10 4 m/s at an angle of 35° with respect to a 0.0045-T magnetic field. If the magnetic field exerts a force of 0.0026 N on the particle, determine the magnitude of the charge.
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This note was uploaded on 03/14/2011 for the course PHYSICS 105 taught by Professor Kruse,m during the Spring '08 term at Duke.

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magnetism7-18 - TYPICAL NUMERIC QUESTIONS FOR PHYSICS I...

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