Question : dynamo is a device for converting 

Option 1: heat energy into electrical energy

Option 2: mechanical energy into electrical energy

Option 3: megnetic energy into electrical energy

Option 4: chemical energy into electrical energy

Question : In which form is the supplied heat energy stored during change in temperature of substance?

Option 1: Heat energy

Option 2: Kinetic energy

Option 3: Potential energy

Option 4: Both kinetic and potential energy

Question : The enormous amount of energy released in the explosion of an atomic bomb is due to the

Option 1: Conversion of mass into energy

Option 2: Conversion of chemical energy into heat energy

Option 3: Conversion of mechanical energy into nuclear energy

Option 4: Conversion of neutrons into protons

Question : Three successive discounts 22%, 17% and 11% are equivalent to a single discount of:

Option 1: approximately 42%

Option 2: approximately 25%

Option 3: approximately 50%

Option 4: approximately 45%

Question : Gliders depend on the following energy for their flight:

Option 1: wind energy

Option 2: electrical energy

Option 3: heat energy

Option 4: chemical energy