Question 144Electricity & Electronics - Assistant Engineer

The correct answer is B) 4. The illustration EL-0088 shows a wave profile, and the line labeled "4" represents the trailing edge of the wave. This is the point where the wave transitions from the crest to the trough, and it is the correct answer based on the standard definition and understanding of wave characteristics. The other options are incorrect because line 3 represents the wave crest, line 5 represents the wave trough, and line 6 represents the leading edge of the wave, which is the opposite of the trailing edge.