physicstest_MC

physicstest_MC - Exam Name_ TRUE/FALSE. Write 'T' if the...

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Exam Name___________________________________ TRUE/FALSE. Write 'T' if the statement is true and 'F' if the statement is false. 1) Magnetic field lines come out of the south pole of a magnet and enter at the north pole. MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 2) Which of the following statements is correct? A) Earth's north pole is magnetic north. B) The north pole of a magnet points towards the Earth's north pole. C) Like poles of a magnet attract each other and unlike poles repel. D) The SI unit of the magnetic field is the gauss. 3) A +2- m C charge is at rest in a magnetic field of 2 T pointing along the + x -axis. What is the force acting on this charge in the magnetic field? A) +4 m N B) 0 N C) -4 m N D) +2 m N 4) An electron moving along the + x -axis enters a magnetic field. If the electron experiences a magnetic deflection in the - y direction, what is the direction of the magnetic field in this region? A) along the + z -axis B) along the + y -axis C) along the - x -axis D) along the - z -axis 5) A charged particle moving with a certain velocity along the + x -axis enters a magnetic field pointing toward the + z -axis. Determine the required direction of an electric field that will allow the charged particle to continue to move along the + x -axis. A) along the - x -axis B) along the - y -axis C) along the + y -axis D) along the + x -axis Figure 22-2 6) A rectangular coil, with corners labeled ABCD, of length L and width w is placed in a magnetic field B as shown in Figure 22-2. If there is a current I flowing through this coil, what is the force acting on section AB of this coil? A) ILB B) ILB sin q C) 0 N D) ILB /2 1
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7) A wire is carrying current vertically downward. What is the direction of the force due to Earth's magnetic field on the wire? A) horizontally towards the east B) horizontally towards the south C) horizontally towards the west D) horizontally towards the north Figure 22-3 8) A wire in the shape of an "M" lies in the plane of the paper. It carries a current of 2.0 A, flowing from A to E. It is placed in a uniform magnetic field of 0.55 T in the same plane, directed as shown on the right side of Figure 22-3. The figure indicates the dimensions of the wire. What is the magnitude and direction of the force acting on section AB of this wire?
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This note was uploaded on 11/20/2009 for the course UNKNOWN h taught by Professor H during the Summer '01 term at NYU Poly.

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physicstest_MC - Exam Name_ TRUE/FALSE. Write 'T' if the...

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