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1. Three wires (I1= 5A, I2=7.50A, I3=10A) are placed on a three corners of a square of a side l=7.50cm . The fourth corner is
1. Three wires (I1= 5A, I2=7.50A, I3=10A) are placed on a three corners of a square of a side l=7.50cm . The fourth corner is the point P. Calculate the net magnetic field (both magnitude and direction) at P