Question
Draw a wave and indicate points which are (i) in phase (ii) out of phase (iii) have a phase difference of π/2.
✓
Answer
i. In phase point: A and F; B and H; C and I; D and J
ii. Out of phase points: A and B, B and D, FI and J, E and F,
iii. Point having phase difference of π/2: A and B; B and C; D; D and F; F and H; H and I; J and I
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