waec model questions vol1 2024 physics
Objective • Question 22
Question 22
WAEC_MODEL_QUESTIONS_VOL1
•
2024
A long straight wire carries a current of 10 A. Calculate the magnetic field strength at a distance of 0.05 m from the wire. Use the formula B = (μ₀ * I) / (2 * π * r), where μ₀ = 4π × 10⁻⁷ Tm/A.
Answer Options
A.
6e-6
B.
8e-6
Correct Answer
C.
4e-6
D.
2e-6
Correct Answer
C
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