The voltage across a resistor carrying current can be calculated using the formula:
a. E = I + R [voltage equals current plus resistance]
b. E = I - R [voltage equals current minus resistance]
c. E = I x R [voltage equals current times resistance]
d. E = I / R [voltage equals current divided by resistance]
Your answer "c" is CORRECT!
E = I x R
I = E / R
R = E / I
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