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In an AC circuit, the voltage E, current I, and impedance Z are related by the

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Formula E = I · Z.

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Find the voltage in a circuit with current 2 + 5i amps and Impedance is 4 – i ohms. \"\"

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E = I · Z

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Substitute I and Z values

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The FOIL method can be used to multiply the complex numbers.

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Foil method: the product of two binomials is the sum of the products of the First terms,

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the Outer terms, the Inner terms and the Last terms.

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The word FOIL is an acronym for the four terms of the product.

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\"\"\"\"   (Multiply using FOIL method)

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\"\"                (Multiply: \"\")

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\"\"                           (Multiply: \"\")

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\"\"                                 (Add: \"\")\"\"\"\"                       (Substitute the imaginary unit value \"\")

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\"\"                                (Product of two same signs is positive)

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Apply commutative property of addition: a + b = b + a.

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\"\"                                    (Add: \"\")

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The voltage is \"\" volts.