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In a series RLC circuit, if the magnitude of the voltage drop across R, L and C is measured to be 30 V each, then the magnitude of the supply voltage to the circuit will be:

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MPPGCL JE Electrical 19 March 2019 Shift 2 Official Paper
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  1. 0 V
  2. 30 V
  3. 60 V
  4. 90 V

Answer (Detailed Solution Below)

Option 2 : 30 V
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Detailed Solution

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Concept

qImage67cdcd4d1d6eed7ad4be8c69

The source voltage for a series RLC circuit is given by:

\(V_S=V_R+j(V_L-V_c)\)

Calculation

Given that, VR = VL = VC = 30 V

\(V_S=30+j(30-30)\)

VS = 30 V

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