The right-hand thumb rule is used to find the

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Force on a charged particle passing through the magnetic field.

Force on a current-carrying conductor placed in the magnetic field.

Direction of the magnetic field around a current carrying a straight conductor.

Direction of induced current.

answer is D.

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Detailed Solution

The right-hand thumb rule is used to find the direction of the magnetic field around a current carrying a straight conductor.
Consider holding a current-carrying perfectly straight conductor in your right-hand palm. The thumb of the right hand represents the direction of the current. Then, the fingers of the hand will wrap around the conductor in the direction of the field lines of the magnetic field. As the diagram is given below,
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