Electrical Engineering - Inductors - Discussion

Discussion :: Inductors - General Questions (Q.No.13 )
13.
An inductor and a resistor are in series with a sine wave voltage source. The frequency is set so that the inductive reactance is equal to the resistance. If the frequency is increased, then

[A].
V_{R} ≥ V_{L} [B].
V_{L} < V_{R} [C].
V_{L} = V_{R} [D].
V_{L} > V_{R}

Answer: Option D

Explanation:

No answer description available for this question.

Seyran said:
(Aug 30, 2011)
With frequency increasing, reactance supposed to be increased as well, it means the right answer is option D.

Sah said:
(Oct 10, 2011)
Xl=2*Pi*f*L, with increase in reactance, voltage is supposed to increase. The correct option can be D. If anyone has alternative please reply.

Sandeep Siet Allahabad said:
(Dec 24, 2011)
As we know that xl=f, so increasing frequency, inductance voltage increase also vl>vr.

Qazi Hashim Jan said:
(Jan 24, 2012)
When the frequency is increased then the impedance X(L) increases and the drop VL across the inductor increases as compared to VR across R.

Bhola said:
(Jan 2, 2013)
As we know Xl=2*pi*f*L. So when f will increase Xl increases and voltage drop through inductance increases (Vl=I*Xl). So Vl must be greater than Vr.

Asr said:
(Oct 2, 2016)
Inductive reactance is directly proportional to frequency xl = 2 * 3.142 * f * l(xl=f).

Santosh said:
(Dec 10, 2016)
If frequency increases, inductance increases.

Arun Kumar M said:
(Feb 16, 2017)
Frequency affects only on inductor XL = 2Pifl in a resistor frequency doesn't affect. If frequency increases VL is greater.