Solved papers for JEE Main & Advanced JEE Main Paper (Held On 11 April 2015)

done JEE Main Paper (Held On 11 April 2015) Total Questions - 2

• question_answer1) For the LCR circuit, shown here, the current is observed to lead the applied voltage. An additional capacitor C', when joined with the capacitor C present in the circuit, makes the power factor of the circuit unity. The capacitor C', must have been connected in : [JEE Main Online Paper (Held On 11 April 2015)]  
  A)
   series with C and has a magnitude\[\frac{1-{{\omega }^{2}}LC}{{{\omega }^{2}}L}.\]
  done clear
  B)
   series with C and has a magnitude\[\frac{C}{({{\omega }^{2}}LC-1)}.\]
  done clear
  C)
   parallel with C and has a magnitude\[\frac{C}{({{\omega }^{2}}LC-1)}.\]
  done clear
  D)
    parallel with C and has a magnitude\[\frac{1-{{\omega }^{2}}LC}{{{\omega }^{2}}L}.\]
  done clear
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• question_answer2) The AC voltage across a resistance can be measured using a : [JEE Main Online Paper (Held On 11 April 2015)]  
  A)
   potentiometer
  done clear
  B)
   moving coil galvanometer
  done clear
  C)
   moving magnet galvanometer
  done clear
  D)
   hot wire voltmeter
  done clear
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