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A distance r separates two infinite straight wires carrying currents I₁ and I₂. Which of the following
I₁, I2, and r combinations produces the largest magnitude of force per unit length?
A. Combination A
B. Combination B
Choices I₁ [A] I₂ [A] r [m]
A
1.0
3.5
2.0
B
1.5
2.0
C
4.0
D
2.0
1.0
2.0
3.0
2.0 2.0
C. Combination C
D. Combination D

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