Physics
Grade-10
Easy
Question
A uniform magnetic field B is directed along the positive z-axis along which an infinitely long cylinder is kept parallel. As seen from the z-axis, the direction of the induced current is:
- Anticlockwise of the +ve z axis
- Along the magnetic field
- Zero
- Clockwise of the +ve z axis
Hint:
When the cylinder is parallel to the z-axis of magnetic field B, the induced current will be zero.
The correct answer is: Zero
When the cylinder is parallel to the z-axis of magnetic field B, the induced current will be zero.
- The induced current would be maximum if the cylinder is in perpendicular to the z-axis.
- Here, the cylinder is kept parallel to the z-axis.
- The induced current and its direction will be zero as it is in 180 degrees from the axis.
-
Since the magnetic field B is uniform, there is no change in the magnetic flux linked with the cylindrical wire.
-
Hence no current will be induced on the surface of the cylindrical wire.
Since the magnetic field B is uniform, there is no change in the magnetic flux linked with the cylindrical wire.
Hence no current will be induced on the surface of the cylindrical wire.
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