Q.11)-Which of the following is false with reference to a photo-voltaic cell?
  • It is another name as solar cell
  • It can be used as infra-red detectors
  • It can store light energy in the form of electrical energy
  • It converts electric energy into light energy
Q.12)-One kilowatt hour is equal to
  • 3.6 Mega joule
  • 3.8 Mega joule
  • 3.2 Mega joule
  • 4.0 Mega joule
Q.13)-In which of the following cases, kinetic energy is being used in performing work?
  • Paddling the bicycle to cover a distance
  • Driving a car to cover a distance
  • Wind mill grinding wheat grain
  • Rowing a boat in the lake
Q.14)-Which of the following pairs of physical quantities have the same dimensions?
  • Force and power
  • Work and power
  • Work and energy
  • Momentum and power
Q.15)-The energy stored in a watch spring is
  • Kinetic energy
  • Potential energy
  • Heat energy
  • Chemical energy
Q.16)-Energy that is produced commerically from coal is called
  • Light energy
  • Kinetic energy
  • Thermal energy
  • Potential energy
Q.17)-In a photocell light energy is converted into
  • Potential energy
  • Chemical energy
  • Heat energy
  • Electrical energy
Q.18)-A kilowatt-hour is unit of
  • Energy
  • Power
  • Electric charge
  • Electric current
Q.19)-Solar energy is converted into chemical energy during
  • Transpiration
  • Photosynthesis
  • Diffusion
  • Osmosis
Q.20)-In a rechargeable cell what kind of energy is stored within the cell?
  • Electrical energy
  • Potential energy
  • Chemical energy
  • Kinetic energy