Physics 30 Dec 2000 Diploma Exam

The value of b is record your three digit answer

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Unformatted text preview: our point charges are arranged as shown. G1 – 12 µC 1.0 m G2 + 3.0 µC 1.0 m + 5.0 µC G3 11. 1.0 m 2 1.0 m + 5.0 µC G4 The magnitude of the net electric field at point P due to these four point charges is A. 5.4 × 104 N/C B. 4.5 × 104 N/C C. 2.7 × 104 N/C D. 0.0 N/C 7 Use the following information to answer the next two questions. Solar-Powered Toy Car A solar-powered toy car contains a photocell that converts solar energy into the electric energy needed to power its small electric motor. This electric motor converts the electrical energy into the mechanical energy necessary to move the toy car. The operation of the car depends on the amount of power produced by the photocell. A student decides to investigate the factors affecting the power output of the photocell. The student connects a voltmeter, an ammeter, and a small resistor to the photocell in three different circuits. 1 11 111 Photocell Photocell Photocell V A A V Resistor 12. Resistor V Resistor Which of the three electrical circuits would properly measure the voltage and current output of the photocell? A. B. C. D. 13. A Circuit I only Circuit II only Circuit III only Circuits I and II only The power of the photocell could be expressed in units of A. B. C. D. J/C A/V V/m J/s 8 Use the following information to answer the next question. A 6.00 Ω resistor and a 4.00 Ω resistor are placed in series across a potential difference of 10.0 V. 6.00 10.0 V 4.00 14. Ω Ω A circuit that would use four times as much power as the circuit above is 2.00 10.0 V Ω B. 10.0 Ω 10.0 V C. 10.0 V Ω 3.00 A. D. 5.00 Ω 5.00 Ω 10.0 V 9 6.00 Ω 3.00 Ω Use the following information to answer the next question. Three voltmeters are placed in a circuit as shown below. V1 V3 15. For this circuit, the equation that would satisfy Kirchhoff’s rule for potential difference is A. V1 – V3 = V2 B. V3 + V1 = V2 C. V3 – V2 = V1 D. 16. V2 V1 = V2 = V3 A high-intensity halogen desk lamp operates at 1.25 A and 12.0 V AC. It has a built-in transformer to step down the 110 V AC obtained from the wall outlet. If the transformer is ideal, the current used from the wall outlet when the lamp is switched on is A. B. C. D. 0.0873 A 0.136 A 1.25 A 11.5 A 10 Numerical Response 5. A 50.0 cm length of wire has a weight of 0.389 N and a current of 0.250 A. The wire remains suspended when placed perpendicularly across a magnetic field. The strength of the magnetic field is __________ T. (Record your three-digit answer in the numerical-response section on the answer sheet.) Use the following information to answer the next question. Two bar magnets of equal magnetic strength are placed as shown below. The point P is the same distance from each of the magnets. 2 S N N S 17. The direction of the magnetic field at P due to the two bar magnets is A. B. C. D. 11 Use the following information to answer the next question. Moving electrons can be deflected by electric fields, gravitational fields, and magnetic fields. One electron is allowed to enter each type of...
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