MCQ Chapter 3 Class 7 Science Curiosity NCERT Advertisement Electricity: Circuits and their Components 1. What is the primary source of electricity discussed in the context of a torchlight?Solar panelElectric cellWall socketWindmillQuestion 1 of 202. How many terminals does an electric cell have?OneTwoThreeFourQuestion 2 of 203. What is the positive terminal of an electric cell typically made of?Flat metal discPlastic coverProtruding metal capRubber baseQuestion 3 of 204. What is a combination of two or more electric cells called?CircuitBatterySwitchConductorQuestion 4 of 205. In a torchlight, what part of an incandescent lamp glows to produce light?Glass bulbMetal caseFilamentInsulatorQuestion 5 of 206. What type of lamp is commonly used in modern torches instead of an incandescent lamp?Fluorescent lampLED lampHalogen lampNeon lampQuestion 6 of 207. How can you identify the positive terminal of an LED?It is the shorter wireIt is the longer wireIt is marked with a minus signIt is inside the glass bulbQuestion 7 of 208. What happens when the switch in a torchlight is slid to the 'ON' position?The lamp turns offThe circuit is brokenThe lamp glowsThe battery is disconnectedQuestion 8 of 209. Why does an LED only glow in one specific arrangement in a circuit?It has a filamentIt allows current in one direction onlyIt requires multiple cellsIt is an insulatorQuestion 9 of 2010. What is the function of a switch in an electrical circuit?Generates electricityCompletes or breaks the circuitStores electrical energyIncreases current flowQuestion 10 of 2011. What material is commonly used for electrical wires due to its conductivity and cost?SilverGoldCopperAluminiumQuestion 11 of 2012. Why are electrical wires covered with plastic or rubber?To increase conductivityTo protect from electric shocksTo make them strongerTo reduce weightQuestion 12 of 2013. What type of current is typically provided by batteries?Alternating Current (AC)Direct Current (DC)High Voltage CurrentLow Voltage CurrentQuestion 13 of 2014. What happens to an incandescent lamp when its filament breaks?It glows brighterIt stops glowingIt uses less energyIt changes colorQuestion 14 of 2015. In a circuit diagram, what does the long line in the symbol for an electric cell represent?Negative terminalPositive terminalWire connectionSwitch positionQuestion 15 of 2016. What is the purpose of a conduction tester?To generate electricityTo identify conductors and insulatorsTo measure voltageTo charge batteriesQuestion 16 of 2017. Which material listed in the document is an insulator?CopperSilverPlasticAluminiumQuestion 17 of 2018. What should you never do when handling electrical appliances?Use dry handsTouch switches with wet handsCheck for damaged insulationUse batteriesQuestion 18 of 2019. What is the direction of electric current in a circuit?From negative to positive terminalFrom positive to negative terminalIn both directionsRandomlyQuestion 19 of 2020. What is a circuit diagram?A photograph of a circuitA representation of a circuit using symbolsA list of circuit componentsA blueprint of a batteryQuestion 20 of 20 Loading...
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