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| 1 | Capacitive reactance increases with more capacitance and higher frequencies for sine-wave ac voltage applied. |
 | A) | True |
| B) | False |
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| 2 | A coupling capacitor is used to pass the desired dc signal variations while blocking the ac voltage. |
| A) | True |
| B) | False |
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| 3 | For any capacitor, the 90° phase relationship between vc and ic exists for all values of capacitance or any frequency of sine wave alternating voltage. |
| A) | True |
| B) | False |
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| 4 | Capacitive voltage is the same in all parts of a series circuit. |
| A) | True |
| B) | False |
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| 5 | With respect to a series current, both the applied voltage and capacitive voltage are 90° out of phase with capacitive current. |
| A) | True |
| B) | False |
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| 6 | Capacitive voltage lags capacitive current by 90° and the waves have different frequencies. |
| A) | True |
| B) | False |
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| 7 | When series voltage drops that are out of phase are combined, they cannot be added without taking the phase difference into account. |
| A) | True |
| B) | False |
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| 8 | The Pythagorean theorem states that the hypotenuse is equal to the square root of the sum of the squares of the sides. |
| A) | True |
| B) | False |
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| 9 | In a series RC circuit, VT is the phasor sum of the two voltages VR and VC 180° out of phase. |
| A) | True |
| B) | False |
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| 10 | The resultant of the phasor addition of XC and R is their total opposition in ohms called . |
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| 11 | In a series RC circuit, the phasor for XC, IXC, or VC is at degrees. |
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| 12 | The trigonometric function of an angle equal to the ratio of the opposite side to the adjacent side of a triangle is the . |
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| 13 | In order for a coupling capacitor to be effective, its reactance should be or less of the series resistor. |
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| 14 | When capacitors are connected in series across a voltage source, the series capacitors serve as a voltage . |
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| 15 | When voltages are out of phase addition is necessary. |
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| 16 | With sine-wave alternating current, the voltage division between series capacitors can be calculated on the basis of . |
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| 17 | When calculating capacitive current, capacitive reactance applies only to waves. |
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| 18 | For a series RC circuit, when R is equal to or greater than 10 times XC, |
| A) | ZT is approximately equal to R |
| B) | ZT is approximately equal to C |
| C) | ZT is equal to ∞ Ω |
| D) | ZT is equal to 0 Ω |
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| 19 | What circuit can be used to set the conduction time of semiconductors in power-control circuits? |
| A) | RC filter |
| B) | oscillator |
| C) | regulator |
| D) | phase-shifter |
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| 20 | For R in parallel with XC, ZEQ can be calculated |
| A) | by adding R and XC |
| B) | by using product over algebraic sum |
| C) | by subtracting R and XC |
| D) | by using Ohm's law |
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| 21 | What is the total current when a 30mA IR is in parallel with another branch current of 40 mA for IC? |
| A) | 5 mA |
| B) | 50 mA |
| C) | 500 mA |
| D) | 70 mA |
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| 22 | What value of capacitance can be used as a coupling capacitor for frequencies 50 Hz and up with a series resistance of 400 Ω? |
| A) | 0.79 μF |
| B) | 7.9 μF |
| C) | 79 μF |
| D) | 790 μF |
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| 23 | In what circuit is ic used as a reference and vc is considered to lag by 90° |
| A) | series resistive |
| B) | series capacitive |
| C) | parallel resistive |
| D) | parallel capacitive |
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| 24 | When analyzing an RC circuit, which of the following values of I and V can be used? |
| A) | rms only |
| B) | peak only |
| C) | instantaneous only |
| D) | rms, peak, or instantaneous |
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| 25 | Which law or theorem states that the hypotenuse is equal to the square root of the sum of the squares of the sides? |
| A) | Thevenin |
| B) | Kirchhoff |
| C) | Pythagorean |
| D) | Norton |