MCQ Science and Technology Class 9 Chapter 3 Maharashtra Board Current Electricity 1. Why is electricity critical in the modern world?It powers nearly all daily activities and appliancesIt is used only in industrial settingsIt is primarily for animal useIt is not needed for domestic appliancesQuestion 1 of 202. What do hospitals and banks use to manage power supply failures?Solar panelsGeneratorsWind turbinesBatteriesQuestion 2 of 203. Which animal uses electricity for catching prey and self-defense?SharksDolphinsEelsWhalesQuestion 3 of 204. What natural phenomenon is cited as an example of electricity flow?EarthquakeTornadoVolcanic eruptionLightningQuestion 4 of 205. What force drives water flow from a higher to a lower level in a dam?WindGravityPressureTemperatureQuestion 5 of 206. To what is electric potential compared in the water flow analogy?Water temperatureWater volumeWater levelWater speedQuestion 6 of 207. In which direction does a positive charge flow?From higher to lower potentialFrom lower to higher potentialIn a random directionNo flow occursQuestion 7 of 208. How do electrons move in a conductor relative to potential?From higher to lower potentialIn a circular pathFrom lower to higher potentialNo movement occursQuestion 8 of 209. What is the potential difference between two points?The sum of their potentialsThe product of their potentialsThe difference between their potentialsThe ratio of their potentialsQuestion 9 of 2010. What causes the potential difference in a cell?Magnetic fieldsChemical reactionsMechanical motionThermal energyQuestion 10 of 2011. How is electric potential difference defined quantitatively?Work done per unit chargeCharge per unit timeWork done per unit timeCharge per unit workQuestion 11 of 2012. What is the SI unit of potential difference?AmpereCoulombOhmVoltQuestion 12 of 2013. Who constructed the first electric cell?George Simon OhmAndré-Marie AmpèreAlessandro VoltaJames WattQuestion 13 of 2014. What are free electrons in a metallic conductor?Electrons in the nucleusWeakly attached outermost electronsTightly bound electronsImmobile electronsQuestion 14 of 2015. What role do free electrons play in a conductor?Increase resistancePrevent current flowCarry negative chargeBind to atomsQuestion 15 of 2016. What is the motion of free electrons in a wire not connected to a cell?Circular motionRandom motionFixed directional motionNo motionQuestion 16 of 2017. What causes electrons to move directionally in a wire connected to a cell?Electric forceGravitational forceFrictional forceMagnetic forceQuestion 17 of 2018. What is the conventional direction of current flow?From negative to positive terminalFrom positive to negative terminalIn a random directionNo specific directionQuestion 18 of 2019. How is electric current quantitatively defined?Charge per unit distanceWork done per unit chargeCharge passing through a conductor per unit timePotential difference per unit timeQuestion 19 of 2020. What is the SI unit of electric current?OhmVoltAmpereCoulombQuestion 20 of 20 Loading...
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