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