Class XI

The coefficient of area expansion is n times of coefficient of linear expansion. where n equals
  1. 2
  2. 4
  3. 6
  4. 8
A wooden cube just floats inside water when a 200gm mass is placed on it. When the mass is removed, the cube is 2 cm above the water level. The size of the cube is
  1. 10 cm
  2. 5 cm
  3. 15 cm
  4. 20 cm
A surveyor uses a steel measuring tape that is exactly 50.000 m long at a temperature of 20∘∘C. The markings on the tape are calibrated for this temperature. (a) What is the length of the tape when the temperature is 35∘∘C? (b) When it is 35∘∘C, the surveyor uses the tape to measure a distance. The value that she reads off the tape is 35.794 m. What is the actual distance? α=1.2×10−5/∘C
  1. 50.008 m, 35.600 m
  2. 50.009 m, 35.800 m
  3. 50.010 m, 35.900 m
  4. 50.007 m, 35.750 m
Two absolute scales A and B have triple points of water defined to be 200 A and 350 B. What is the relation between TATA and TBTB ?
  1. TATA = (5/9) TB
  2. TATA = (4/7) TB
  3. TATA = (2/7) TB
  4. TATA = (3/7) TB
The Celsius temperature at absolute zero is equal to
  1. -100∘∘ C
  2. 273∘ C
  3. 100∘∘ C
  4. -273∘∘ C
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