The phasor diagram shown in the figure represents which of the following circuits?

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MPPGCL JE Electrical 28 April 2023 Shift 1 Official Paper
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  1. R-L-C series circuit when XC = 0
  2. R-L-C series circuit when XL > XC
  3. R-L-C series circuit when XL = 0 
  4. R-L-C series circuit when XL < XC

Answer (Detailed Solution Below)

Option 2 : R-L-C series circuit when XL > XC
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Detailed Solution

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Concept

Rules for drawing phasor diagram:

  • The given diagram is series connected, so the current is taken as reference.
  • The voltage across the resistor is in phase with current.
  • The voltage leads the current by 90° in the inductor.
  • The voltage lags the current by 90° in the capacitor.


Explanation

The phasor diagram for series RLC circuit is shown below:

In the diagram shown above, we observed that the net voltage (Vs) leads the current (I). This means inductive reactance (XL) is greater than capacitive reactance (XC) i.e.   XL > XC

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