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The self-inductance of a coil is 2 Henry and 5its resistance is 20 Ω. The value of current in it changes from 10A to 9A in 0.01 s. The time constant of the coil will be

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The self-inductance of a coil is 2 Henry and 5its resistance is 20 Ω. The value of current in it changes from 10A to 9A in 0.01 s. The time constant of the coil will be






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