Two Long Bar Magnets Are Aligned So That North Poles

question 17

Multiple Choice

Two long bar magnets are aligned so that north poles face each other. The magnets are separated by 1 cm, and a repulsive force between the north poles is 0.04 N. When the separation is increased to 2 cm the force will be

• A) 0.010 N.
• B) 0.020 N.
• C) 0.025 N.
• D) 0.40 N.
• E) 0.050 N.

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