Tuesday, 26 May 2015

Physics for competitive exams – 11

111. The temperature of the sun is measured by ----         pyrometer

112. An iron ball is heated; the percentage increase will be largest in -----         volume

113. The absolute zero is the temperature at -----         molecular motion ceases

114. Thermal expansion takes place in a -----          solid

115. Which of the following produces more severe burns ?
(a) Boiling water (b) steam     (c) hot air   (d) sun rays
Ans. (b) steam

116. The factor not needed to calculate heat lost or gained when there is no change of state -----      relative density

117. Wet clothes do not dry up quickly in rainy season even at high temperature because ------       the relative humidity is high


118. Boiling water is changing into steam under this condition. The specific heat of water is -----      infinite

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