Frequency is the reciprocal of the period.(T/F?). There are 360 degrees in a com

Question

Frequency is the reciprocal of the period.(T/F?). There are 360 degrees in a complete cycle of a sine wave (T/F?). Which of the following has the units of time? f = 1/T T = 1/R T = 1/f T = V/(f) A given rms value of a sine wave is equal to the same value of DC voltage with respect to the heat produced in a resistor. Given the sine wave in Figure 11-1, identify the peak-to-peak voltage: value A value B value C value D value E Given the sine wave in Figure 11-1, identify the negative peak voltage: value A value B value C value D value E If the rms value of the waveform in Figure 11-4 is 10 V rms, what is the peak voltage? 28.28 V 14.14 V 7.07 V 20V The frequency of the waveform in Figure 11-4 is 1 Hz 1000 cycles per second 1 kHz Both B and C are correct.

Explanation / Answer

1) f=1/T .... True

2) true... 2pi radians = 360 degrees

3) option C (T=1/f => units = 1/Hz => 1/s-1 = s (seconds))

4) Yes.

For DC: heat produced H = VDC2/R

For AC: heat produced H = VRMS2/R

5) Value B. option B

6) value D. option D

7) Vrms = Vpeak/sqrt(2) => 10 = Vpeak /1.414 =>  Vpeak = 14.14 . option B

8) T = 1 ms = 10-3 s => f = 1/T = 1/10-3 => 103 Hz ... option B

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