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 2 of 3.
Vino said:
9 years ago
I can't understand it. Please help me.
Rahul said:
9 years ago
Option A is right. Because it crosses zero at the angle of 45 degrees. But B is cross after 60 degrees.
Jsjjaj said:
9 years ago
Option b is the correct answer.
STUTI KUSHWAHA said:
10 years ago
Answer is A. Because if we think with the help of graph then we find that a start from 45 and after 15 means at 60 b will start then it is clear that a is lead with 15.
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.
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.
Sivanath said:
1 decade ago
I support for the option A because the one which crosses zero cross over will lead the other one.
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.
Kanagalakshmi said:
1 decade ago
What is the correct answer? please explain it.
Xain said:
1 decade ago
A is right answer think about quadrant system and divide angle on them.
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