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Question
Which, among the following, is the correct expression for φ.
Options:
A .  φ=tan¯¹ (XL/R)
B .  φ=tan¯¹ (R/XL)
C .  φ=tan¯¹ (XL*R)
D .  φ=cos¯¹ (XL/R)
Answer: Option A
Answer: (a).φ=tan¯¹ (XL/R)
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