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Chapter 32: Q. 18 (page 924)

A low-pass filter consists of a 100mFcapacitor in series with a 159鈩�resistor. The circuit is driven by an ACsource with a peak voltage of 5.00V.

a. What is the crossover frequency fc?

b. What is VCwhen f=12fc,fc and 2fc?

Short Answer

Expert verified

(a) Crossover frequency, fc=10Hz

(b) When f=12fC,fCand 2fC, VCis independent of fC

Step by step solution

01

Find Crossover frequency (part a)

a.

The frequency at which sound moves from one speaker to the following is understood because the crossover frequency.

The electronic crossover components during a passive speaker decide where the sound passes from the speaker channels to the sub woofer.

C=100渭F(micro frequency)

R=159惟(ohm)

Vo=5.00V(voltage)

Hz-hertz

For crossover frequency, we utilize a formula.

w=1RC

2蟺fc=1RC

=1RC脳12蟺

fc=12蟺RC

In place of the values

localid="1650212366547" fc=12蟺脳159惟脳100脳10-6F

fc=10Hz

02

Explain and derive the values (part b)

b.

The voltage of a secondary printing plate during a cathode-ray storage tube with regard to the cathode voltage, upon which emission is unity.

Vcis independent offc

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Most popular questions from this chapter

Draw the phasor for the emf 蔚=(170)cos((2蟺脳60hz)t)att=60ms

Consider the parallel RLC circuit shown in FIGURECP32.72.

a. Show that the current drawn from the emf is

I=蔚o1R2+1蝇L-蝇C2

Hint: Start with a phasor that is common to all three circuit elements.

b. What is Iin the limits 蝇鈫�0and 蝇鈫�鈭�?

c. Find the frequency for which Iis a minimum.

d. Sketch a graph of Iversus 蝇.

a. Evaluate VCat emf frequencies 1,3,10,30,100KHz

b. Graph VCversus frequency. Draw a smooth curve through your five points.

A capacitor has a peak current of 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the peak volt-age at 250kHZis 2.2V.

a. What is the capacitance?

b. If the peak voltage is held constant, what is the peak current at 500kHZ?

The current in a series RLC circuit lags the EMF by 20掳. You cannot change the EMF. What two different things could you do to the circuit that would increase the power delivered to the circuit by the EMF?
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