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RL Circuits

Q1:
The phase angle in the circuit in the given circuit is approximately equal to ______.

A 53°

B 90°

C 37°

D 0°

ANS:C - 37°

Just keeping in mind the tangent graph and its relation in this circuit: (When Calculator is not allowed).

tan(angle)=2*π*f*L/R; .

For this question we can use the act==> angle is less than 45 if 0<(2*π*f*L/R)<1.

Otherwise greater than that in positive values. Here we have (2*π*f*L/R) <1. Also, note that (2*π*f*L/R) will be positive always.



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