Question

6) The period of a 5 Hz wave form is 200 ms. 7) 20 Vrms of alternating current will illu direct current Il illuminate a given lamp at the same intensity as 20 V of LTIPLE CHOICE. Choose the one alternative that best com le alternative that best completes the statement or answers the question. o what is the instantaneous voltage at 42° on a 230 VP sine wave! A) 149 V B) 115 V C) 76.1 V D) 154 V Figure 8-1 9) Which one of the following represents the value at point G in Figure 8-12 A) the frequency B) the period C) the peak voltage D) the RMS voltage 10) 10) Which of the following can be measured from points B to F in Figure 8-1? A) the frequency B) the angle C) the peak-to-peak voltage D) the period 11) in Figure 8-1. C D and F D) A and B 11) VPP is measured between points A) C and H B) G and I 12) D D 12) Which point in Figure 8-1 is 180° away from point E? AA B) B C) С

Answer 1

8. D.

Vinst= 230*sin42°=154

9. D.

By point G RMS voltage is measured in volts.

10. D.

From point B to F one time period of wave can be measured.

11. D

Peak to peak value is measured from point A to B.

12. A

Point A is at 0° and point E is at 180°. They both are 180° apart.