Q.21)-Which of the following has the largest value of specific heat
- Glass
- Copper
- Lead
- Water
Q.22)-When hot water is sprinkled on a hotter glass tumbler it breaks because
- Glass suddenly expands
- Glass suddenly contracts
- Water evaporates
- Glass reacts chemically with water
Q.23)-Which one of the following is an insulator?
- Copper
- Wood
- Mercury
- Aluminium
Q.24)-Heat is transmitted from higher temperature to lower temperature through the actual motion of the molecules in
- Conduction
- Convection
- Radiation
- Both conduction and convection
Q.25)-Which of the following are methods of heat transfer
- Convection
- Evaporation
- Revolution
- Thermal expansion
Q.26)-Which of the following devices can be used to detect radiant heat
- Liquid thermometer
- Six's maximum and minimum thermometer
- Constant volume air thermometer
- Thermopile
Q.27)-Why white clothes keep you cooler as compared to black clothes?
- They absorb whole of the light
- They reflect the whole light
- Penetration of light does not occur
- Make the sunlight completely cool.
Q.28)-The dimensional formula of plank's constant contains the dimension of
- Linear motion
- Angular momentum
- Energy
- Force
Q.29)-When hot liquid is poured into a thick glass tumbler it cracks because glass
- Is a bad conductor of heat so only inner surface expands
- Has high temperature coefficient of expansion
- Has very low specific heat
- Has very low temperature coefficient of expansion
Q.30)-First law of thermodynamics is normally related to
- Law of conservation of energy
- Newton's law of cooling
- Boyle's law
- Charle's law