NCERT/Class 10/Science/Electricity

Electricity

Class 10 · Science

150 questions50 easy50 medium50 hard

Sample Questions

Q1.A conductor has resistance that changes with temperature. What does this indicate about resistivity?

  • AResistivity is independent of temperature
  • BBoth resistance and resistivity vary with temperature
  • COnly resistance changes with temperature, not resistivity
  • DResistivity decreases as temperature increases for all materials

Q2.A current of 4 A flows through a wire for 2 minutes. The potential difference across it is 12 V. How much energy is dissipated?

  • A96 J
  • B5760 J
  • C960 J
  • D192 J

Q3.In a circuit, a 6 V battery (no internal resistance) is connected to R1 = 3 Ω, R2 = 6 Ω in parallel, and this is in series with R3 = 1 Ω. What fraction of total power is dissipated in R3?

  • A1/3
  • B1/4
  • C1/2
  • D2/3

Q4.An electric room heater uses 20 A at 110 V and another uses 10 A at 220 V. Which produces more heat per second?

  • AFirst heater produces more heat
  • BSecond heater produces more heat
  • CBoth produce equal heat per second
  • DCannot determine without knowing resistance

Q5.Two wires A and B of same material have lengths in ratio 1:2 and diameters in ratio 2:1. If both are connected to the same voltage, what is the ratio of heat generated per second (A:B)?

  • A1:2
  • B2:1
  • C8:1
  • D1:8

Q6.This is a sample question to preview what you'll get in the full practice test...

  • A. Option one
  • B. Option two
  • C. Option three
  • D. Option four
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Concepts Covered

AlloysAmmeterBalanced CircuitBattery EMFBulb BrightnessBulb PowerBulb ResistanceCalculationCharge CalculationCharge FlowCircuit ProtectionCommercial CalculationCommercial UnitConductorsConventional CurrentCost CalculationCurrentCurrent CalculationCurrent ChangeCurrent DistributionCurrent DivisionCurrent RatingCurrent-Heat RelationshipCurrent-Resistance RelationshipDefinitionDimensional AnalysisEMFElectric BulbElectric ChargeElectric CircuitElectric CurrentElectric Current MeasurementElectric EnergyElectric PowerElectric WorkElectrical TransmissionEnergy CalculationEnergy ConsumptionEnergy DissipationEquivalent ResistanceFormulaFuseGeometric Wire ProblemH = I²RtHeat CalculationHeating EffectHeating ElementInert GasInternal ResistanceJoule's HeatingJoule's LawJoule's law H = I²RtJoule's law of heatingMaximum Power TransferMaximum ResistanceMeasurement ErrorMinimum ResistanceNon-ohmic DevicesNumerical CalculationOhm's LawOhm's lawOpen CircuitP = I²RParallel BatteryParallel CircuitParallel ConnectionPotential DifferencePotential Difference MeasurementPower CalculationPower ComparisonPower DissipationPower DistributionPractical AdvantagesPractical ApplicationProportional ReasoningR = ρl/ARated ValuesRatio ProblemsResistanceResistance CalculationResistance FactorsResistivityResistivity FormulaRheostatSI UnitsSI unitsSeries BatterySeries CircuitSeries ConnectionSeries Voltage DivisionSeries-ParallelSeries-Parallel CircuitSeries-Parallel CombinationSeries-Parallel ComparisonTemperature DependenceTerminal VoltageTungstenUnit ConversionUnit PrefixV-I CharacteristicsV-I GraphVariable ResistanceVoltage CalculationVoltage ChangeVoltage DistributionVoltage DivisionVoltage Division RuleVoltage MeasurementVoltmeterWheatstone BridgeWork Calculationcommercial unit of energycross-sectional area calculationcurrent and powerelectric fuseelectric powerelectric power in serieselectricity tariffenergy cost calculationheat generatedheating element propertiesjoulekWhkWh billingmulti-appliance energy calculationnichrome alloynichrome vs copperparallel circuitrated vs actual powerresistance formularesistance from ratingresistivityresistivity formularesistivity of alloyssafety devicescaling analysisseries circuitunit conversionvoltage division

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