A wire carrying current I and other carrying 2I in the same direction produces a magnetic field B at the mid point. What will be the field when 2I wire is switched off
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Verified by ExpertsThe correct answer is:
C
When two parallel conductors carrying current I and 2I in same direction, then magnetic field at the midpoint is
When current 2I is switched off then magnetic field due to conductor carrying current I is 
.
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