1. By which of the following methods does heat transfer not take place?   Convection   Conduction   Radiation   Refraction   Hint Half-n-half Clue   2. The high pitched cries of a bat are above human hearing.   True   False   3. How much heat is required to raise the temperature of 1g of water by 1 oC.   100 Joules   1 Joule   100 Calories   1 Calorie   Half-n-half Clue   4. Which of the following is not a good heat insulator?   Iron   Wool   Wood   Feathers   Half-n-half Clue   5. Bending of light rays when they enter a different medium is known as   Refraction   Convection   Reflection   Radiation   Half-n-half Clue   6. A bicycle dynamo generates Direct Current.   True   False   7. A freely suspended magnet always aligns itself along the   East West Axis   East South Axis   West South Axis   North South Axis   Half-n-half Clue