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In case I was misunderstanding universal's previous question, let me clarify the situation:
Frame 1 (lab frame):
Wire is neutral and carries a current. Test charge is moving. Electrostatic force on test charge is 0 because wire is neutral. Magnetic force on test charge is non-zero since charge is moving.
Frame 2 (test-charge frame):
Wire is charged and carries a current. Test charge is at rest. Electrostatic force on test charge is non-zero because the wire is charged. Magnetic force on test charge is 0 since charge is not moving.
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