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 : When a body falls from an aeroplane, there is an increase in its 

Option 1: kinetic energy

Option 2: mass

Option 3: acceleration

Option 4: potential energy

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 : 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 : Pankaj purchases a watch for Rs. 1000. He sells the watch at a discount of 20% and earns a profit of 40%. What is the marked price of the watch?

Option 1: Rs. 1640

Option 2: Rs. 1880

Option 3: Rs. 1980

Option 4: Rs. 1750