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The phase difference ϕ is given by tan ϕ = X_L / R.

1. ϕ = π/6
2. ϕ = π/4
3. ϕ = π/3
4. ϕ = π/2

Correct answer: ϕ = π/4

Solution

The phase difference ϕ is determined by the arctangent of the ratio of the inductive reactance (X_L) to the resistance (R). Without specific values for X_L and R, the most likely answer is ϕ = π/4, assuming X_L = R.

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