A coil lies flag on a tabletop in a region where the magnetic field vector point

Question

A coil lies flag on a tabletop in a region where the magnetic field vector points straight up. The magnetic field suddenly vanishes. When views from above, what is the direction of the induced current in this cool as the field is vanishing. A. The current flows clockwise initially and then flows counter clockwise before stopping. B. The current flows counterclockwise initially and then flows clockwise before stopping. C. The current flows clockwise D. The current flows counter-clockwise E. There is no induced current in this coil Why??
A coil lies flag on a tabletop in a region where the magnetic field vector points straight up. The magnetic field suddenly vanishes. When views from above, what is the direction of the induced current in this cool as the field is vanishing. A. The current flows clockwise initially and then flows counter clockwise before stopping. B. The current flows counterclockwise initially and then flows clockwise before stopping. C. The current flows clockwise D. The current flows counter-clockwise E. There is no induced current in this coil Why??
A. The current flows clockwise initially and then flows counter clockwise before stopping. B. The current flows counterclockwise initially and then flows clockwise before stopping. C. The current flows clockwise D. The current flows counter-clockwise E. There is no induced current in this coil Why??

Explanation / Answer

The induced current flows counter-clockwise.

we find the direction of induced current by using right hand rule and keeping track of sign/direction.

the thumb points in the direction of magnetic field, the fingers curl in the direction of induced current

since the magnetic field is decreasing and vanishes, magnetic field points straight up. the fingers curl in the counter-clockwise direction, whoch is the diection of induced current.

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