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From the diagram above, if the potential differences across the resistor, capacitor, and inductor are...

Physics
JAMB 2023

From the diagram above, if the potential differences across the resistor, capacitor, and inductor are 30V, 120V, and 60V, respectively, the effective potential difference is

  • A. 81
  • B. 67
  • C. 59
  • D. 73
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Correct Answer: Option B
Explanation

\(V_L\)=60 V ,\(V_C\) = 120 V ,  \(V_R\) =30V
 

;V = ?

; \(V^2\) = \(V_R^2\) +  \(V_L\) -  \(V_C^2\)

= \(V^2\) = \(30^2\)  + \(60 - 120^2\)

= \(V^2\)  = 900 + 3600

= \(V^2\)  = 4500

=  V =  4500 = 67V

There is an explanation video available below.


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Explanation Video

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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 127076
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