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The value of a resistor to drop 100 volt with a current of 0.8 milliampere is:

  a.   125 ohm

  b.   125 kilohm

  c.   1250 ohm

  d.   1.25 kilohm
Your answer "b" is CORRECT!

R = E / I
= 100 / 0.0008
= 125,000
= 125 kilohms.

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