11LED lamps are preferred over incandescent lamps because they:AProduce more heatBAre dimmerCUse much less energy and last longerDContain mercuryView AnswerDiscussWorkspaceReportSaveEasy
12Which lamp has the highest luminous efficacy among these?AIncandescentBCandleCHalogenDLEDView AnswerDiscussWorkspaceReportSaveEasy
13Energy-efficient motors save energy mainly by:ARunning fasterBUsing higher voltage onlyCReducing losses through better materials and designDDrawing more currentView AnswerDiscussWorkspaceReportSaveEasy
14Induction heating is used for:ARoom heating onlyBHeating conducting materials by eddy currentsCCooking with flamesDHeating insulatorsView AnswerDiscussWorkspaceReportSaveEasy
15Dynamic (rheostatic) braking:AReturns energy to the supplyBUses friction onlyCReverses the supplyDConverts kinetic energy into heat in resistorsView AnswerDiscussWorkspaceReportSaveEasy