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Gaokao Physics Practice Question

某理想变压器原、副线圈的匝数之比为 1: 10 , 当输入电压增加 $20 \mathrm{~V}$ 时, 输出 电压

  1. A.降低 $2 \mathrm{~V}$
  2. B.增加 $2 \mathrm{~V}$
  3. C.降低 $200 \mathrm{~V}$
  4. D.增加 $200 \mathrm{~V}$

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