Physics-
General
Easy

Question

In an ac circuit, the potential difference across an inductance and resistance joined in series are respectively 16 V and 20 V. The total potential difference across the circuit is

  1. 20.0 V    
  2. 25.6 V    
  3. 31.9 V    
  4. 53.5 V    

The correct answer is: 25.6 V


    V equals square root of V subscript R end subscript superscript 2 end superscript plus V subscript L end subscript superscript 2 end superscript end root equals square root of left parenthesis 20 right parenthesis to the power of 2 end exponent plus left parenthesis 16 right parenthesis to the power of 2 end exponent end root equals square root of 656 equals 25.6 V

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