The inductive reactance of the coil having inductance of 0.5 henry in which AC of 50 Hz flows is
Correct answer: C. 157 ohm
- A. 94.2 ohm
- B. 1.57 ohm
- C. 157 ohm
- D. 9.4 ohm
Explanation
The inductive reactance of a coil is given by \(X_L = 2πfL\), where \(f\) is the frequency of the AC and \(L\) is the inductance of the coil. Substituting the given values, \(X_L = 2π(50)(0.5) = 157\, \Omega\).
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About Alternating Current
Alternating current varies periodically, so phase relationships become essential when current passes through a resistor, capacitor or inductor. The chapter distinguishes resistance from capacitive and inductive reactance, explains phase lead and lag, and connects changing electric and magnetic fields with the production and properties of electromagnetic waves.
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