In a fluorescent lamp choke (a small transformer), 100 V of reverse voltage is produced when the choke current changes uniformly from 0.25 A to 0 A in a duration of 0.025 ms. The self-inductance of the choke (in mH) is estimated to be _.

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10. ε=L(Δ I)/(Δ t)⇒100=L×(0.25)/(0.025×10⁻³). L=(100×0.025×10⁻³)/(0.25)=10⁻² H =10 mH.

In a fluorescent lamp choke (a small transformer), 100 V of reverse voltage is produced when the choke current changes uniformly from 0.25 A to 0 A in a duration of 0.025 ms. The self-inductance of the choke (in mH) is estimated to be _____.

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