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CTET Solved Paper - RTET Feburary 2011 Paper2

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136. Frequency of ultrasound is

  • Option : D
  • Explanation : Greater than 20,000 Hzis ultrasound frequency.
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137. Pitch of sound depends on

  • Option : A
  • Explanation : Frequency determine the pitch of sound.
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138. The number of magnetic lines of force passing through a given area is known as

  • Option : C
  • Explanation : Magnetic flux is defined as the number of magnetic lines of force passing through a given area.
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139. A bulb (100 W, 200 V) is connected to a voltage of 160 V. The power dissipation is

  • Option : A
  • Explanation : Given P = 100 W , V = 200 V
    Power P = V2/R
    reetfeb11/q139_a
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140. One kilowatt hour is unit of

  • Option : B
  • Explanation : One kilowatt hour is a commercial unit of energy.
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RTET Feburary 2011 Paper2