Question 1The international unit of energy is ........A.kilo calorie (kcal)B.kilohertsC.grammeD.JouleObjective Show full explanation
Question 2Which of the following materials is a conductor? A.plasticB.sodiumC.gasD.glassObjective Show full explanation
Question 3The charge carriers in gases are: A.ions onlyB.electrons and holesC.holes onlyD.electrons and ionsObjective Show full explanation
Question 4A job is done slowly, while an identical job is done quickly. Both jobs require the same amount of work but different amounts of ......A.energyB.powerC.both of theseD.none of theseObjective Show full explanation
Question 6Satellite communication network make use of A.infra-red raysB.waveC.visible lightD.radio waveObjective Show full explanation
Question 7An electric device is rated 2000W, 250V. The correct fuse rating of the device is?A.8AB.9AC.7AD.6AObjective Show full explanation
Question 8A car battery rated 45AH is charged with a charger whose rating is 2.5A. How long will it take to charge the battery fully? A.20hrsB.10hrsC.5hrsD.18hrsObjective Show full explanation