Question: A single-turn square loop carries a current of 18 A. The loop is 15 cm on a side and has a mass of 0.035 kg.

A single-turn square loop carries a current of 18 A. The loop is 15 cm on a side and has a mass of 0.035 kg. Initially the loop lies flat on a horizontal tabletop. When a horizontal magnetic field is turned on, it is found that only one side of the loop experiences an upward force. Find the minimum magnetic field, Bmin, necessary to start tipping the loop up from the table.

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