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Byju's Answer
Standard XII
Physics
Magnetic Field Due to a Circular Ring on the Axis
The magnetic ...
Question
The magnetic field around a current-carrying coil lasts.
A
For three hours
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B
As long as current flows thorugh it
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C
Till its half-life period
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D
Field is permanent
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Solution
The correct option is
B
As long as current flows thorugh it
Magnetic field around a current carrying coil is temporary magnet due to electromagnetism.
Thus it exist only as long as current flows through it
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