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If there is 6 A of current through the filament of a lamp, how many coulombs of charge move through the filament in 1.75 s? A. 10.5 C B. 105 C C. 3.4 C D. 34 C |
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A multimeter measures A. current B. voltage C. resistance D. current, voltage, and resistance |
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A material that does not allow current under normal conditions is a(n) A. insulator B. conductor C. semiconductor D. valence |
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he colored bands for a 4,700 ohm resistor with a ten percent tolerance are A. yellow, violet, red, gold B. yellow, violet, orange, gold C. yellow, violet, red, silver D. orange, violet, red, silver |
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When the current is 2.5 A, how many coulombs pass a point in 0.2 s? A. 12.5 C B. 1.25 C C. 0.5 C D. 5 C |
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Eight-tenths coulomb passes a point in 4 s. The current in amperes is A. 1.6 A B. 16 A C. 2 A D. 0.2 Ae |
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A two-terminal variable resistor is known as a A. potentiometer B. thermistor C. rheostat D. wiper |
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A thermistor is a type of A. switch B. resistor C. battery D. power supply |
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Electrons in the outer orbit are called A. nuclei B. valences C. waves D. shells |
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The conductance of an 8 ohm resistance is A. 12.5 mS B. 8 mS C. 12 S D. 125 mS |
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When placed close together, two positively charged materials will A. attract B. become neutral C. become negative D. repel |
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Which of the following is not a type of energy source? A. generator B. rheostat C. solar cell D. battery |
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The minimum resistance value for a blue, gray, red, silver resistor is A. 612 B. 6,120 C. 6,800 D. 6,460 |
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Current flows in a circuit when A.a switch is opened B. a switch is closed C.the switch is either open or closed D. there is no voltageCurrent flows in a circuit when |
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The unit of electrical charge is the A. coulomb B. joule C. volt D. watt |
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Materials with lots of free electrons are called A.conductors B. insulators C. semiconductors D. filters |
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A transformer has a 1:6 turns ratio and a secondary coil load resistance of 470 . The load resistance as seen by the source is A. 1.3 B. 7.8 C. 78 D. 13 |
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What is the coefficient of coupling for a transformer in which 4% of the total flux generated in the primary does not pass through the secondary? A. 0.4 B. 4 C. 9.6 D. 0.96 |
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When a 6 V battery is connected across the primary of a transformer with a turns ratio of 8, the secondary voltage is A. 0 V B. 6 V C. 48 V D. 0.75 V |
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In a certain transformer, the input power to the primary is 120 W. If 8.5 W are lost to the winding resistance, what is the output power to the load, neglecting any other issues? A. 0 W B. 14.1 W C. 111.5 W D. 1,020 W |
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