Science 30 January 2000 Diploma Examination
Science 30 January 2000 Diploma Examination Science 30 January 2000 Diploma Examination
Use the following information to answer the next three questions. Circuit for Trilight Lamp 120 Ω Switch I 240 Ω Switch II 110 V The control switch on a trilight lamp can control three different light intensities (high, medium, and low), depending on the combination of switches activated. 28. When switches I and II are closed, the total resistance in the above circuit is A. 0.0125 Ω B. 3.00 Ω C. 80.0 Ω D. 360 Ω 29. The switch combination that will draw the largest current is A. I open, II open B. I open, II closed C. I closed, II open D. I closed, II closed 16
30. As current passes through a light filament, the temperature of the filament increases and its colour changes from A. red to yellow to white B. red to white to yellow C. white to yellow to red D. yellow to white to red 31. A nuclear-powered submarine is most likely fueled by A. ethanol B. uranium C. methane D. hydrogen 32. A nuclear reactor produces high-voltage electrical energy that must be stepped down for use in a submarine. To decrease the voltage in the submarine’s circuits, the engineers would use A. a resistor B. a generator C. an alternator D. a transformer Numerical Response 8. An 18.0 A welder is used for maintenance aboard the submarine. When plugged into a 220 V circuit, the resistance of the welder is ______Ω. (Record your answer to three digits in the numerical-response section on the answer sheet.) 17
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<strong>30</strong>. As current passes through a light filament, the temperature of the filament<br />
increases and its colour changes from<br />
A. red to yellow to white<br />
B. red to white to yellow<br />
C. white to yellow to red<br />
D. yellow to white to red<br />
31. A nuclear-powered submarine is most likely fueled by<br />
A. ethanol<br />
B. uranium<br />
C. methane<br />
D. hydrogen<br />
32. A nuclear reactor produces high-voltage electrical energy that must be stepped<br />
down for use in a submarine. To decrease the voltage in the submarine’s circuits,<br />
the engineers would use<br />
A. a resistor<br />
B. a generator<br />
C. an alternator<br />
D. a transformer<br />
Numerical Response<br />
8. An 18.0 A welder is used for maintenance aboard the submarine. When plugged<br />
into a 220 V circuit, the resistance of the welder is ______Ω.<br />
(Record your answer to three digits in the numerical-response section on the answer sheet.)<br />
17
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