# Problem: Two round concentric metal wires lie on a tabletop, one inside the other. The inner wire has a diameter of 20.0 cm and carries a clockwise current of 12.0 A, as viewed from above, and the outer wire has a diameter of 30.0 cm. What must be the magnitude and direction (as viewed from above) of the current in the outer wire so that the net magnetic field due to this combination of wires is zero at the comment center of the wires?

🤓 Based on our data, we think this question is relevant for Professor Martin's class at NOTRE DAME.

###### Problem Details

Two round concentric metal wires lie on a tabletop, one inside the other. The inner wire has a diameter of 20.0 cm and carries a clockwise current of 12.0 A, as viewed from above, and the outer wire has a diameter of 30.0 cm. What must be the magnitude and direction (as viewed from above) of the current in the outer wire so that the net magnetic field due to this combination of wires is zero at the comment center of the wires?

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Magnetic Field Produced by Loops and Solenoids concept. You can view video lessons to learn Magnetic Field Produced by Loops and Solenoids. Or if you need more Magnetic Field Produced by Loops and Solenoids practice, you can also practice Magnetic Field Produced by Loops and Solenoids practice problems.

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What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Martin's class at NOTRE DAME.