Physics 30 Dec 2000 Diploma Exam

B c d 11 use the following information to answer the

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Unformatted text preview: field, as shown below. Represents field out of surface + Field 1 Represents field into surface Field 2 + + + + + + e¯ + + + e¯ Field 3 e¯ 18. If the electron is deflected downward in each field, then field 1, field 2, and field 3 are, respectively, A. B. C. D. electric, magnetic, and gravitational gravitational, magnetic, and electric magnetic, gravitational, and electric magnetic, electric, and gravitational 12 Use the following information to answer the next question. Selected Regions of the Electromagnetic Spectrum I II III IV V 19. television AM radio gamma radiation ultraviolet light visible light When the regions of the electromagnetic spectrum listed above are arranged in order of increasing wavelength, this order is A. B. C. D. III, I, V, II, IV II, I, V, IV, III III, IV, V, I, II IV, V, III, I, II Use the following diagram to answer the next question. µN - (C ( The Electric Field Component of an Electromagnetic Wave in a Vacuum 20. J (10- s) 6 0 1 3 5 The wavelength of this electromagnetic wave is A. 6.0 × 102 m B. 1.2 × 103 m C. 2.5 × 105 m D. 7.5 × 1013 m 13 7 Use the following information to answer the next three questions. A fluorescent tube operates by exciting mercury atoms from their ground state to an excited state. The return of the atoms to a lower energy level results in the emission of electromagnetic radiation that cannot be seen. Through a process called fluorescence, a phosphor powder coating on the inside of the glass tube converts the radiation emitted by the mercury atoms into electromagnetic radiation that can be seen. A fluorescent light fixture draws 80.0 W of electrical power when connected to a 110 V AC power supply. Numerical Response 6. The mercury atoms emit electromagnetic radiation with a wavelength of 254 nm. The minimum amount of energy that must be transferred to a mercury atom during excitation to enable this emission, expressed in scientific notation, is b × 10–w J. The value of b is __________. (Record your three-digit answer in the numerical-response section on the answer sheet.) 21. The electromagnetic radiation emitted by the mercury atoms cannot be seen because it is A. B. C. D. 22. in the ultraviolet region of too low an intensity in the infrared region of too slow a speed In a circuit protected by a 15.0 A circuit breaker, the maximum number of fluorescent light fixtures that can be connected in parallel is A. B. C. D. 21 20 1 0 14 23. The threshold frequency of light for the emission of photoelectrons from a metal is 4.4 × 1014 Hz. If light of frequency 6.6 × 1014 Hz shines on the metal, then the maximum kinetic energy of the emitted photoelectrons is A. B. 4.4 × 10–19 J C. 2.9 × 10–19 J D. 24. 7.3 × 10–19 J 1.5 × 10–19 J J. J. Thomson’s experiments indicated that cathode rays are A. B. C. D. 25. photons electromagnetic radiation positively charged particles negatively charged particles The highest X-ray frequency that can be produced by an X-ray tube operating at 6.5 × 104 V is A. 6.4 × 10–20 Hz B. 1....
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