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  4. A straight horizontal conducting rod of length 50 cm and mass 50 gm is suspended by two vertical wires at its ends. A current of 5.0 A is set up in the rod through the wires. What magnetic field should be set up normal to the conductor in order that the tension in the wires is zero ? (Take g =10 ms -2 )

Q. A straight horizontal conducting rod of length and mass is suspended by two vertical wires at its ends. A current of is set up in the rod through the wires. What magnetic field should be set up normal to the conductor in order that the tension in the wires is zero ? (Take )

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Solution:

For tension to be zero,

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