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The primary and secondary coil of a transformer each have an inductance

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The primary and secondary coil of a transformer each have an inductance of 200 × 10-6 H. The mutual inductance (M) between the windings is 4 × 10-6 H. What percentage of the flux from one coil reaches the other?

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Data: LP = LS = 2 × 10-4 H, M = 4 × 10-6 H

= 2 × 10-2

Therefore, the percentage of flux of the primary reaching the secondary is

0.02 × 100% = 2%

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