Final answer:
The induced emf will be zero, and no time is required for the loop to complete the 90 degree turn.
Step-by-step explanation:
To find the time it takes for the loop to complete a 90 degree turn, we can use the equation ΔΦ = ΑΒΔ(cos θ).
Since the area of the loop (A) and the magnetic field strength (B) are constant, we can rewrite the equation as ΔΦ = ABΔ(cos 90).
Since cos 90 = 0, we have ΔΦ = 0.
Therefore, the induced emf will be zero, and no time is required for the loop to complete the 90 degree turn.