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Gen - G5C - Resistors, capacitors & inductors in series & parallel
Terms in this set (18)
What causes a voltage to appear across the secondary winding of a transformer when an AC voltage source is connected across its primary winding?
Which part of a transformer is normally connected to the incoming source of energy?
Which of the following components should be added to an existing resistor to increase the resistance?
A resistor in series
What if the total resistance of three 100 ohm resistors in parallel?
33.3 ohms ( R = 1 / [1/R + 1/R + 1/R] )
If 3 equal value resistors in parallel produce 50 ohms of resistance, & the same 3 resistors in series produce 450 ohms, what's the value of ea. resistor?
What's the R M S voltage across a 500-turn secondary winding in a transformer if the 2250 turn primary is connected to 120 V A C?
26.7 volts ( ES = EP x [NS/NP] )
What is the turns ratio of a transformer used to match an audio amplifier having a 600 ohm output impedance to a speaker having a 4 ohm impedance?
12.2 to 1 ( Turns ratio = the impedance ratio = √ZP/ZS
What's the equivalent capacitance of two 5,000 picofarad capacitors & one 750 picofarad capacitor connected in parallel?
10750 picofarads ( sum them in parallel )
What's the capacitance of three 100 microfarad capacitors connected in series?
300 microfarads ( C = 1 / [1/C + 1/C+ 1/C]
What's the inductance of three 10 millihenry inductors connected in parallel?
3.3 mH ( L = 1 / [1/L + 1/L+ 1/L]
What's the inductance of a 20 millihenry inductor in series with a 50 millihenry inductor?
70 millihenrys ( for series, sum them )
What's the capacitance of a 20 microfarad capacitor in series with a 50 microfarad capacitor?
14.3 microfarads ( C = 1 / [1/C + 1/C+ 1/C]
Which of the following components should be added to a capacitor to increase the capacitance?
A capacitor in parallel
Which of the following components should be added to an inductor to increase the inductance?
An inductor in series
What's the total resistance of a 10 ohm, a 20 ohm, & a 50 ohm resistor in parallel?
xtra: Resistors in series: SUM, in parallel: RECIP
xtra: Capacitors in series: RECIP, in parallel: SUM
xtra: Inductors in series: SUM, in parallel: RECIP
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