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When is tanφ positive?
  • a)
    When inductive reactance is less than capacitive reactance
  • b)
    When inductive reactance is greater than capacitive reactance
  • c)
    When inductive reactance is equal to capacitive reactance
  • d)
    When inductive reactance is zero
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
When is tanφ positive?a)When inductive reactance is less than capa...
 tanφ is positive when inductive reactance is greater than capacitive reactance because current will lag the voltage.
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Most Upvoted Answer
When is tanφ positive?a)When inductive reactance is less than capa...

Explanation:

Inductive Reactance vs. Capacitive Reactance
- Inductive reactance (Xl) is the opposition to the flow of current in an inductor in an AC circuit.
- Capacitive reactance (Xc) is the opposition to the flow of current in a capacitor in an AC circuit.

When is tanφ positive?
- The phase angle (φ) between the current and voltage in an AC circuit can be determined using the tangent of the phase angle formula: tanφ = Xl - Xc / R, where R is the resistance in the circuit.
- When inductive reactance is less than capacitive reactance, i.e., Xl < xc,="" the="" numerator="" of="" the="" formula="" becomes="" />
- Since the denominator (resistance) is always positive, a negative numerator results in a positive tangent value for the phase angle.
- Therefore, tanφ is positive when inductive reactance is less than capacitive reactance.

Conclusion
- In summary, tanφ is positive when the inductive reactance in an AC circuit is less than the capacitive reactance. This indicates that the current leads the voltage in the circuit, and the phase angle is positive.
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When is tanφ positive?a)When inductive reactance is less than capacitive reactanceb)When inductive reactance is greater than capacitive reactancec)When inductive reactance is equal to capacitive reactanced)When inductive reactance is zeroCorrect answer is option 'A'. Can you explain this answer?
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