Sources of energy Worksheet-3
A. one hundredth B. one thousandth
C. one billionth D. One millionth.
A. 3000°C B. 30,000°C
C. 6000°C D. 10,000°C
A. Kerosene B. Wood C. Petrol D. Diesel
A. Wood B. Coal C. Diesel D. Natural gas.
A. Coal gas plant B. Natural gas plant
C. Solar cell D. Biogas plant.
A. 0.006% B. 0.714% C. 99.2% D. 100%
A. 1 MeV B. 20 MeV C. 200 MeV D. 2000 MeV
A. 25 ton B. 250 ton C. 2500 ton D. 25000 ton
A. 1.6 × 10–13 J B. 1.6 × 10–19 J
C. 1.6 × 1013 J D. 1.6 × 1019 J
A. 1 eV B. 1 MeV C. 931 MeV D. 931eV
A. graphite B. cadmium C. boron D. Uranium.
A. too large B. too heavy C. radioactive D. foul smelling
A. nuclear reactor B. atom bomb
C. hydrogen bomb D. None of these.
Answer Key:
Explanation: 1 MeV = 106 eV = 108 (1.6 × 10–19 J) = 1.6 × 10–13 J
Explanation: 1 u = 931 MeV.
Explanation: Waste from nuclear fission reactions is radioactive. It emits nuclear radiations which are harmful.