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The current flowing through a resistor can be calculated by using the formula:

  a.   I = E x R [current equals voltage times resistance]

  b.   I = E / R [current equals voltage divided by resistance]

  c.   I = E + R [current equals voltage plus resistance]

  d.   I = E - R [current equals voltage minus resistance]
Your answer "d" is not correct. "b" is the right answer.

E = I x R
I = E / R
R = E / I

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