2.1 What is the applied voltage for a series RLC circuit when iT =  3mA.   _,
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             VL = VvC  = 18 v and  R= 1 Kohm?
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Step 1:
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The total current in the RLC circuit is \"\".

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The resistance in the RLC circuit is

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The capacitor voltage \"\".

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The inductor voltage \"\".

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Formula for the source voltage is \"\".

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Where \"\" capacitor voltage,

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            \"\" inductor voltage,

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            \"\" resistor voltage,

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The voltage drop due to resistor can be found using \"\".

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\"\"

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Source voltage is

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\"\"

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Therefore applied voltage is 3V.

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Option (A) is correct choice.

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2.2 How much current will flow in a 100 Hz series RLC circuit if VS = 20 V, RT = 66 Ω and XT = 47 Ω?

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Step 1:
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The source voltage is \"\".
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The total resistance in the RLC circuit is \"\".
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 Total reactance in the RLC circuit is \"\".
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The current flowing trhough RLC circuit is \"\".
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Substitute \"\", \"\" and \"\".
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\"\"
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The current flowing trhough RLC circuit is 246.83 mA.
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Option (C) is correct choice.
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What is the current phase angle of a parallel RLC circuit when IL = 15.3 A, IC = 0.43 A and IR = 3.5A
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 Step 1:

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The current through the resistor \"\".

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The current through the inductor \"\".

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The current through the capacitor \"\".

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The current phase angle of a parallel RLC circuit is \"\".

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\"\"

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The current phase angle is \"\".

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Option (D) is correct choice.
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What is the range between f1 and f2 of an RLC circuit that resonates at 150 kHz and has a Q of 30?
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Step 1:
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The resonating frquency is 150 kHz.
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The quality factor Q = 30.
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Bandwidth is given as \"\".
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Where \"\" is bandwidth,
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             Q is quality factor,
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             \"\" is  resonating frquency.
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\"\"
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Now observe the option.
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Only option (B) has the 5 KHz difference.
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Option (B) is correct choice.
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Series RLC voltage or impedance totals must be calculated by:
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Step 1:
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In the Series RLC circuit, the total impedance can be find as the vector sum of the resistance and reactance.
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 Total impendance is \"\".
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Magnitude of the impedance is \"\". \ \
So option (C)  correct choice.
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When _ XL =  XC  the circuit:
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Step 1:
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In RLC circuit :
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When \"\" , circuit is inductive.
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When \"\" , circuit is capacitive.
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When \"\" , circuit is at resonace.
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So when \"\", the circuit is at resonace.
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\ Option (C) is correct choice. \
 
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