Answer the following statement(s) true (T) or false (F)
1. A current-carrying circular loop and a current-carrying straight wire create very different magnetic fields in the empty space that surrounds them. Even so, the curl of at a distance r from the center of the loop along its axis and the magnitude of the curl the same distance r from the wire’s center have the same numerical value.
1. TRUE
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Two asteroids have identical masses. However, one asteroid is twice as far from the Sun than the other. According to Newton's Universal Law of Gravitation the force of gravity exerted by the Sun on the more distant asteroid is
A) the same size as the force exerted on the closer asteroid B) one-quarter of the size of the force exerted on the closer asteroid C) twice as large as the force exerted on the closer asteroid D) one-half of the size of the force exerted on the closer asteroid
A certain CD-ROM disk can store approximately 6.0 × 102 megabytes of information, where 106 bytes = 1 megabyte. If an average word requires 9.0 bytes of storage, how many words can be stored on one disk?
A) 6.7 × 107 words B) 5.4 × 109 words C) 2.1 × 107 words D) 2.0 × 109 words
Which voltage is not caused by a source of emf?
a. the voltage across a charged capacitor b. the voltage across two copper-iron junctions at different temperatures c. the voltage across the terminals of a dry cell battery d. the voltage from an electric generator
Suppose that we double the electrical power flowing into the filament of an incandescent bulb. By what factor will the most probable photon energy ? p increase?
A. 2 1/4 B. 21/3 C. 21/2 D. 2 E. 4 F. 8 T. 16