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Two straight and infinite long wires separated by a distance “r” carrying current “I” in the same direction will have magnetic field zero then what will be the value of “r”?


2 years ago

Susmita
425 Points
							By any information you provided you cannot find out r.But you can find out the distance where the resultant field will be zero.Let it be at a distance x from the first wire.So from the 2nd wire it will be at a distance (r-x).Resultant magnetic field$B=\frac{\mu_{0}}{2\pi}[\frac{1}{x}-\frac{1}{r-x}]$B=0Or,x=r-xOr,2x=rOr,x=r/2So halfway between the wire the resultant field is zero.Please approve if helped.

2 years ago
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### Course Features

• 110 Video Lectures
• Revision Notes
• Test paper with Video Solution
• Mind Map
• Study Planner
• NCERT Solutions
• Discussion Forum
• Previous Year Exam Questions