Class X

 Cooking utensils are a good example of
  1. Conduction
  2. Convection
  3. Radiation
  4. Conduction and Radiation
In order to do work, energy is
  1. Transferred or converted
  2. Used up
  3. Lost
  4. Lost or transferred
 Any two shortest points in a wave that are in phase are termed as
  1. Wave distance
  2. Wave length
  3. Phase length
  4. Amplitude
 A mercury-in-glass thermometer has l100 30 cm and l0 is 10 cm, if lθ is 25 cm, temperature of thermometer would be
  1. 12.5 °C
  2. 25 °C
  3. 50 °C
  4. 75 °C
 If heat capacity of a 10 g of a substance is 300 J K-1, heat capacity of a 100 g of same substance would be equal to
  1. 3 J ⁄ K
  2. 30 J ⁄ K
  3. 300 J ⁄ K
  4. 3000 J ⁄ K
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