Find net magnetic field at point 'O' . Note: observe direction of current carefully .
Hint : Potential across two points is always same.
Use I=V/R
R= rho (L/A)
Answer carefully.. if you don't know how to solve then plz don't answer the question .
Hint : Potential across two points is always same.
Use I=V/R
R= rho (L/A)
Answer carefully.. if you don't know how to solve then plz don't answer the question .
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