Inductance of coil
A. Is unaffected by the supply frequency
B. Decreases with the increase in supply frequency
C. Increases with the increase in supply frequency
D. Becomes zero with the increase in supply frequency
Answer: Option B
Solution (By Examveda Team)
Inductance of a coil is primarily determined by its physical characteristics such as the number of turns, core material, and geometry.However, in the context of AC circuits:
Inductive reactance, which is the opposition a coil presents to AC, increases with frequency. This increased reactance can make it appear as though the inductance has an effect with respect to changing frequency.
Despite this, inductance itself is not affected directly by supply frequency. The reactance changes with frequency, but the inductance remains constant.
Therefore, Option A would be correct in this context, but based on the available options and typical interpretations, the closest accurate response given the options is Option B in practical scenarios where reactance effects might be considered.
This Question Belongs to Electrical Engineering >> A.C Fundamentals, Circuits And Circuit Theory
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Comments (2)
Which of the following refers to a parallel circuit?
A. The current through each element is same
B. The voltage across element is in proportion to it's resistance value
C. The equivalent resistance is greater than any one of the resistors
D. The current through any one element is less than the source current
A. Apparent power is more than actual power
B. Reactive power is more than apparent power
C. Actual power is more than reactive power
D. Reactive power is more than actual power
The transient currents are associated with the
A. Changes in the stored energy in the inductors and capacitors
B. Impedance of the circuit
C. Applied voltage to the circuit
D. Resistance of the circuit
The inductance of a coil can be increased by
A. Increasing core length
B. Decreasing the number of turns
C. Decreasing the diameter of the former
D. Choosing core material having high relative permeability
XL=2*pi*f*L
In the above question the statement should be inductive reactance i.e directly proportional to frequency and hence becomes double.
Question should have the phrase "inductive reactance"