Electronics - Inductors - Discussion

3. 

The inductive reactance of L2 is _____ in the given circuit.

[A]. 3.5 komega.gif
[B]. 4.4 komega.gif
[C]. 16.3 komega.gif
[D]. 23.3 komega.gif

Answer: Option B

Explanation:

No answer description available for this question.

Tim said: (Jun 25, 2014)  
Here total inductance is l = 1/l1+(1/(l2+l3)).

l = 1/450mh+1/(100mh+370mh).

l = (10^6/450+10^6/470) = (2.22222+2.12766)10^6.

l = 4.34988k.

Nearest value is 4.4 kohms.

Just Me said: (Aug 24, 2014)  
If the Inductors were all in parallel your calculation makes sense.

Just calculate the Inductive reactance for the 450mH inductor the value is 2*PI*7000*(450X 10^-3) = 19792 OHMs so the total reactance is higher than this value.

Kiran V said: (Jan 25, 2017)  
XL = 2 * Pi * f * L.
Given: L2 = 100 mH.
XL = 2 * 3.14 * 7 * 10^3 * 100 * 10^-3.
XL = 4396 Ohm.
Nearly
XL = 4.4 K Ohm.

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