A wire carrying current I and other carrying 2I in the same direction produce a magnetic field B at the midpoint. What will be the field when 2I wire is switched off? - VgyanHub

Question:

A wire carrying current I and other carrying 2I in the same direction produce a magnetic field B at the midpoint. What will be the field when 2I wire is switched off?

Options :

(a) B/2
(b) 2B
(c) B
(d) 4B

Answer :

(c) B

Answer Steps :

step 1:

step 2:

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