1. A resistor has a rated value of 100 ohm and a tolerance of 10%. What is its minimum and maximum allowable resistance value?
Answer
Correct Answer:
90 Ohm - 110 ohm
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2. Which one of the following equations most directly determines the amount of current flowing through a resistor when you know the value of the resistor and the voltage drop across it?
Answer
Correct Answer:
I = E/R
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3. At room temperature a conductor has low many holes?
Answer
Correct Answer:
Same number as free electrons
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4. The Norton current is sometimes called the
Answer
Correct Answer:
Shorted-load current
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5. Electron current is flowing through a conductor in a direction you might describe as straight into this page. What is the direction of the resulting magnetic field?
Answer
Correct Answer:
Counterclockwise
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6. A basic capacitor is composed of:
Answer
Correct Answer:
Two conductors separated by a dielectric
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7. The merging of a free electron and a hole is called
Answer
Correct Answer:
Recombination
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8. The equivalent of 1 megohms is:
Answer
Correct Answer:
One million ohms
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9. In a step-down transformer, which is larger?
Answer
Correct Answer:
Primary voltage
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10. Voltage is
Answer
Correct Answer:
Trie force that causes electrons to flow
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11. A device that converts mechanical pressure to electrical energy is called
Answer
Correct Answer:
Piezoelectric device
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12. The value of a capacitor can be made larger by:
Answer
Correct Answer:
Increasing the frequency of the applied voltage
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13. Which one of the following devices is most often used for measuring electrical potential difference?
Answer
Correct Answer:
Voltmeter
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14. When a parallel RLC circuit is operating at its resonant frequency:
Answer
Correct Answer:
Inductive reactance is equal to the capacitive reactance
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15. One henry of inductance is defined as:
Answer
Correct Answer:
The amount of inductance required for generating 1 V of counter emf when the current changes at the rate of 1 A per second
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16. What is the smallest number of polarities required for current flow?
Answer
Correct Answer:
Two - a negative terminal and a positive terminal
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17. Which one of the following phrases most accurately describes the nature of a pulsating dc voltage?
Answer
Correct Answer:
The voltage remains at one polarity but changes value periodically
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18. The Thevenin resistance is equal in value to the
Answer
Correct Answer:
Load resistance
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19. The direction of electron current flow is:
Answer
Correct Answer:
From negative to positive
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20. The total impedance of a series RLC circuit:
Answer
Correct Answer:
Is minimum at the resonant frequency
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