Two parallel long straight conductors carrying currents $I$ and $3 I$ in the same direction are separated by a distance of 4 cm. From wire with lesser current they will produce zero magnetic field at a distance of

1 cm

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2 cm

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3 cm

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7 cm

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Two parallel long straight conductors carrying currents I and 3I in the same direction are separated by a distance of 4 cm. From wire with lesser current they will produce zero magnetic field at a distance of