Questions
An electric current passes through a long straight wire. At a distance 5 cm from the wire the magnetic field is B. The field at 20 cm from the wire would be
detailed solution
Correct option is B
B=10−7 2ir ⇒ BB' = 205 ⇒ B' =B/4Talk to our academic expert!
Similar Questions
Four long insulated current carrying wires, cross each other as shown in the figure. If the separation between any pair of parallel wires is d, the magnetic induction at O is
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