Question : What type of energy conversion takes place in a battery?

Option 1: Chemical energy into light energy

Option 2: Chemical energy into electrical energy

Option 3: Mechanical energy into chemical energy

Option 4: Chemical energy into sound energy

Question : In a water-lifting electric pump, we convert

Option 1: electrical energy into potential energy

Option 2: kinetic energy into electrical energy

Option 3: kinetic energy into potential energy

Option 4: electrical energy into kinetic 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 : If the momentum of a body is doubled, the kinetic energy is:

Option 1: becomes 1/4 times

Option 2: unchanged

Option 3: doubled

Option 4: becomes 4 times

Question : 'Greenhouse effect' means

Option 1: Cultivation of crops in a greenhouse to conserve heat

Option 2: Trapping of solar energy due to carbon dioxide gases

Option 3: Trapping of solar energy by the Earth's upper surface

Option 4: Increase of heat due to atmospheric pollution