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- The negatively and uniformly charged nonconducting disc as shown in the figure is rotated clockwise with great angular speed. The direction of the magnetic field at point A in the plane of the disc
- #Joint Entrance Examination Main
- #Engineering
- #Class 12
- #BITSAT
- #Physics
- #Magnetic Effects of Current and Magnetism
The negatively and uniformly charged nonconducting disc as shown in the figure is rotated clockwise with great angular speed. The direction of the magnetic field at point A in the plane of the disc is
into the page
out of the page
up the page
down the page
Answers (1)
from
Right Hand Thumb Rule -
If straight current carrying conductor is held in the right hand such that the thumb of the hand represents the direction of current flow where folding figures give direction of magnetic lines of force.
- wherein
Disc behaves like made up of coils arranged in a plane in which current is flowing in anti- clockwise direction.
Hence, the field at A is directed into the page. Hence (A).
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