Q. Which of the following is a natural polymer?
1) Bakelite
2) Cellulose
3) PVC
4) Nylon
Q. Radio telescopes are better than optical telescopes because -
1) They can detect faint galaxies which cannot be done by optical telescopes.
2) They an work even in cloudy conditions.
3) They can work during the day and night.
4) All of the above .
Q. Light year is a unit of -
1) time
2) distance
3) light
4) intensity of light
Q. A transformer is used to -
1) increase A.C. voltage.
2) increase D.C. voltage.
3) Convert electrical energy to heat energy.
4) convert A.C. energy to D.C. energy .
Q. What is the most suitable unit to measure the distance of any star?
1) Coulomb
2) Nautical Mile
3) Light year
4) Amperes
Q. Which of the following is not an example of doing work against gravity?
1) Child pulls a toy car
2) Lifting of a baby from the floor
3) Lifting of the weights by a weightlifter
4) Working of a lift by an electric motor
Q. Solar energy is converted into electric energy through -
1) Photo voltaic cells
2) Leclanche cells
3) Voltaic cells
4) Dry cells
Q. Thermodynamically the most stable form of carbon is -
1) Diamond
2) Graphite
3) Graphite
4) Coal
Q. Which of the following materials is most elastic?
1) Iron
2) Rubber
3) Plastic
4) Steel
Q. The unit of frequency is -
1) Hz
2) Kilo Hz
3) Hz/Sec
4) Kg Hz/Sec
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