Name: ID: C 9. A current in a long, straight wire produces a magnetic field. These magnetic field lines B . A. form circles passing through the wire. come in to the wire. D . C. are parallel to the wire. form circles that go around the wire. E. go out from the wire. A vertical wire carrying a current is perpendicular to the surface of a table. The direction of current is toward the floor. The direction of the magnetic field as viewed from above will be The method of determining this is called the -hand rule. A. outward; left D. counterclockwise; left B. clockwise; right E. counterclockwise; right C. outward; right 11. Where is the magnitude of the magnetic field around a permanent magnet greatest? A. Far from the poles . It's equal at all points in the field. ool eisupa s of bet C . Close to the poles op tard estiw aril of enoitoorinos ever! Halfway between the poles. E. Depends on the material of the magnet. 12. A current in a solenoid with several coils creates a magnetic field inside the solenoid. Which of the following will change the strength of the magnetic field? 1. Changing the number of coils (or loops) in the solenoid Il. Changing the direction of current in the solenoid Ill. Changing the amount of current in the solenoid A. I, II, and Ill C. I and II only E. I and Ill only B. I only D. II and Ill only 13. Which conversion process is the basic function of the electric motor? A. electrical energy to mechanical energy B. low voltage to high voltage nerioem C. direct current to alternating current om of v hene laphloels D. alternating current to direct current vevode Y enugi of gristof E. mechanical energy to electrical energy 14. Which of the following will create current in a wire? Ustest 1. Moving a coil of wire through a magnetic field II. A stationary permanent magnet in a coil of wire Ill. Changing the magnetic field around a coil of wire A. II only C. I and ll only E. I, II, and Ill B. II and Ill only D. I and Ill only