Physics-
General
Easy

Question

For the circuit shown in the figure the rms value of voltages across R and coil are E1 and E2 , respectively

The power (thermal) developed across the coil is

  1. fraction numerator E minus E subscript 1 end subscript superscript 2 end superscript over denominator 2 R end fraction    
  2. fraction numerator E minus E subscript 1 end subscript superscript 2 end superscript minus E subscript 2 end subscript superscript 2 end superscript over denominator 2 R end fraction    
  3. fraction numerator E to the power of 2 end exponent over denominator 2 R end fraction    
  4. fraction numerator open parentheses E minus E subscript 1 end subscript close parentheses to the power of 2 end exponent over denominator 2 R end fraction    

The correct answer is: fraction numerator E minus E subscript 1 end subscript superscript 2 end superscript minus E subscript 2 end subscript superscript 2 end superscript over denominator 2 R end fraction

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