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Question

The rule that determines the direction of a magnetic field produced around a straight conductor carrying current is:

This question was previously asked in
CDS 2 2025 Maths Question Paper (14-Sep-2025)
The correct answer is

Right-hand thumb rule

The correct rule for determining the direction of the magnetic field around a current-carrying conductor is the "Right-hand thumb rule", where the thumb of your right hand points in the direction of current and your fingers curl in the direction of the magnetic field.

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