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Calculate the value of the frequency if the inductive reactance is 45 Ω and the value of the inductor is 15 H.

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Calculate the value of the frequency if the inductive reactance is 45 Ω and the value of the inductor is 15 H.

(a) 0.477 Hz

(b) 0.544 Hz

(c) 0.465 Hz

(d) 0.412 Hz

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Asked question is from DC Motors in section Characteristics of DC & AC Motors of Electric Drives

1 Answer

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Correct choice is (a) 0.477 Hz

The best I can explain: The frequency is defined as the number of oscillations per second. The frequency can be calculated using the relation XL = 2×3.14×f×L. F = XL÷2×3.14×L = 45÷2×3.14×15 = .477 Hz.

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