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| 1 | The base unit for capacitive reactance is the ohm. |
 | A) | True |
| B) | False |
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| 2 | For a capacitor, the charge and discharge current flows to and from the plates not through the dielectric. |
| A) | True |
| B) | False |
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| 3 | A very common use of a capacitor is to provide little opposition for dc voltage but to block any ac voltage. |
| A) | True |
| B) | False |
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| 4 | Capacitive reactance is a measure of a capacitor's opposition to the flow of alternating current. |
| A) | True |
| B) | False |
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| 5 | Capacitive reactance is indirectly proportional to the frequency. |
| A) | True |
| B) | False |
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| 6 | When analyzing electronic circuits, capacitors are often treated as a short for dc and as an open for ac. |
| A) | True |
| B) | False |
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| 7 | Series or parallel capacitive reactances are combined in the same way as resistances. |
| A) | True |
| B) | False |
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| 8 | In a capacitive circuit, instantaneous voltage and current are 90° out of phase. |
| A) | True |
| B) | False |
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| 9 | The symbol for capacitive reactance is XC. |
| A) | True |
| B) | False |
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| 10 | The base unit for capacitive reactance is the . |
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| 11 | The symbol for capacitive reactance is . |
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| 12 | A very common use of a capacitor is to dc. |
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| 13 | A measure of a capacitor's opposition to the flow of alternating current is reactance. |
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| 14 | In the formula for capacitive reactance, the constant factor 2π is always . |
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| 15 | Because of the inverse relation between XC and f or C, the graph of XC versus C is . |
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| 16 | For parallel reactances, the combined reactance is calculated by the formula. |
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| 17 | The rate of voltage change, dv/dt for a sine wave, is determined by its and frequency. |
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| 18 | XC equals |
| A) | 1/2πfC |
| B) | 2πfC |
| C) | 2π/fC |
| D) | 1/2πC |
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| 19 | How much XC will there be if the capacitance is 10 μF and the frequency is 1400 Hz? |
| A) | 1140 Ω |
| B) | 114 Ω |
| C) | 11.4 Ω |
| D) | 1.14 Ω |
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| 20 | Which of the following is correct? |
| A) | XC is inversely proportional to capacitance |
| B) | XC is directly proportional to capacitance |
| C) | XC is directly proportional to frequency |
| D) | XC is not affected by frequency |
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| 21 | When analyzing electronic circuits, capacitors are often treated as |
| A) | an open for ac and a short for dc |
| B) | an open for dc and a short for ac |
| C) | a large resistor for high frequencies |
| D) | an ac amplifier |
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| 22 | What is the total capacitive reactance in a series circuit if three capacitors offered 150 Ω of reactance each? |
| A) | 50 Ω |
| B) | 150 Ω |
| C) | 450 Ω |
| D) | not enough information given |
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| 23 | In a capacitive circuit, if the applied voltage is an rms value |
| A) | all calculated currents and voltage drops are also rms values |
| B) | all calculated currents and voltage drops must be peak values |
| C) | all calculated currents and voltage drops are average values |
| D) | all calculated currents and voltage drops are peak-to-peak values |
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| 24 | The rate of voltage change, dv/dt for a sine wave, is determined by its |
| A) | amplitude only |
| B) | frequency only |
| C) | current |
| D) | amplitude and frequency |
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| 25 | What ratio specifies the capacitive reactance in ohms? |
| A) | vc/ic |
| B) | ic/vc |
| C) | dv/dt |
| D) | XC/ic |