Electrical Engineering - Alternating Current and Voltage - Discussion
Discussion Forum : Alternating Current and Voltage - General Questions (Q.No. 19)
19.
Sine wave A has a positive-going zero crossing at 45°. Sine wave B has a positive-going zero crossing at 60°. Which of the following statements is true?
Discussion:
24 comments Page 1 of 3.
Siva jaya said:
1 decade ago
I can't understand this question.
Fayaz Ahmed Memon said:
1 decade ago
Option A is a wrong ansswer.
The correct answer is option B because when wave B is at 60 degree then the wave A is at 45 degree so we can say that wave B is leading wave A by 15 degree (60-45) or wave A lags wave B by 15 degree.
The correct answer is option B because when wave B is at 60 degree then the wave A is at 45 degree so we can say that wave B is leading wave A by 15 degree (60-45) or wave A lags wave B by 15 degree.
Trone said:
1 decade ago
Yes I agree. The answer must be option B.
Because they didn't indicate the peak of the pulse. If they have peak we can clearly say if A lags B or B lags A since it just states sine waves so I assume that the wave have the same wave length and peak. So B is leads wave A by 15 degree.
Because they didn't indicate the peak of the pulse. If they have peak we can clearly say if A lags B or B lags A since it just states sine waves so I assume that the wave have the same wave length and peak. So B is leads wave A by 15 degree.
Gopal said:
1 decade ago
Wave A leads wave B because wave A is crossing zero first.
Xain said:
1 decade ago
A is right answer think about quadrant system and divide angle on them.
Kanagalakshmi said:
1 decade ago
What is the correct answer? please explain it.
Harish said:
1 decade ago
Option A is the correct option. Because if you plot the graph as angles on x-axis a and respective variable(voltage or current) on y-axis, you will observe that wave A is 15 degrees before that of wave B. Therefore you can say wave A leading wave B by 15 degrees.
Sivanath said:
1 decade ago
I support for the option A because the one which crosses zero cross over will lead the other one.
Muralidhar jangid said:
1 decade ago
Answer A is correct answer because when we plot graph, than we observe that wave A lead wave B by 15 degree.
Arslan zahoor said:
1 decade ago
45-60 = -15.
-15 value of wave A, means that's leading the other (B) wave form, such as in capacitor case -90 degree means that current lead the voltage to 90 degree.
-15 value of wave A, means that's leading the other (B) wave form, such as in capacitor case -90 degree means that current lead the voltage to 90 degree.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers