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86.Two parallel long wires carrying current i1 and i2 with i1> 12 . When th currents are in the same direction , then the magnetic field at a point midway b/w the wires is 10 micro T. If the direction of i2 is reversed then the field becomes 30 micro T . THE ratio of currents will be a) 4 b) 3 c)2 d) 1 |
| Answer» 86.Two parallel long wires carrying current i1 and i2 with i1> 12 . When th currents are in the same direction , then the magnetic field at a point midway b/w the wires is 10 micro T. If the direction of i2 is reversed then the field becomes 30 micro T . THE ratio of currents will be a) 4 b) 3 c)2 d) 1 | |