NCERT/Class 10/Science/Magnetic Effects of Electric Current

Magnetic Effects of Electric Current

Class 10 · Science

147 questions47 easy50 medium50 hard

Sample Questions

Q1.What does the magnetic field inside a solenoid resemble?

  • AA bar magnet (uniform parallel field lines inside)
  • BRandom field lines
  • CCircular field lines
  • DNo magnetic field inside

Q2.Explain why an AC generator produces a sinusoidal output.

  • AThe rate of change of magnetic flux through the rotating coil varies sinusoidally with the angle of rotation
  • BThe magnetic field is sinusoidal
  • CThe coil changes shape
  • DThe slip rings create the sine wave

Q3.The magnetic field lines inside a solenoid are nearly uniform and parallel. What does this indicate about the field?

  • AThe field has the same strength and direction at all points inside, meaning a uniform magnetic field
  • BThere is no field inside
  • CThe field varies randomly
  • DThe field is circular

Q4.What is an MCB (Miniature Circuit Breaker)?

  • AAn automatic switch that breaks the circuit during overloading or short circuit
  • BA type of fuse that melts
  • CA voltage regulator
  • DA transformer

Q5.What is Fleming's left-hand rule used for?

  • AFinding the direction of force on a current-carrying conductor in a magnetic field
  • BFinding the direction of induced current
  • CFinding the direction of magnetic field
  • DCalculating resistance

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

ACAC AdvantagesAC FrequencyAC GeneratorAC OnlyAC generatorAC voltageAC vs DC GeneratorAngle DependenceApplicationArmatureBrushesChanging FluxCircular CoilCircular LoopCommutatorConservation of EnergyDCDC MotorDC generatorDC motorDirectionDistanceDomestic SupplyDomestic WiringEMFEarth WireEarth's Magnetic FieldElectric GeneratorElectric MotorElectric ShockElectromagnetElectromagnetic InductionElectromagnetism DiscoveryEnergy ConversionExperimental DesignF = BILFaradayFaraday's lawFleming's Left-hand RuleFleming's Right-hand RuleFleming's left-hand ruleFleming's right-hand ruleForceForce Between WiresForce DirectionForce on ConductorFrequency CalculationFuseFuse PlacementGalvanometerGeneratorHeat LossHeat Loss CalculationHeating EffectIndiaInduced CurrentIron CoreI²R lossLenz's LawLorentz forceMCBMCB vs FuseMagnetic FieldMagnetic Field FormulaMagnetic Field LinesMagnetic Field PatternMagnetic Field StrengthMotor ComponentsMotor EfficiencyMotor PrincipleMotor vs GeneratorMutual InductionNumber of TurnsOerstedOverloadingParallel CircuitParallel CurrentsPolarityPower TransmissionPrinciplePropertiesProportionalityRMS valueRate of ChangeRelative MotionRight-hand Thumb RuleSafetySafety DeviceShort CircuitSinusoidal OutputSlip RingsSoft Iron vs SteelSolenoidSpeed and OutputSplit RingStraight ConductorThree WiresTorqueTransformerTransient CurrentTransmissionUniform FieldVoltageadvantagesalternating currentangle with fieldarea vectorbrusheschanging fluxcharged particle in magnetic fieldcircular coilcircular motioncommutatorcompass deflectioncross productcurrentcurrent detectioncurrent ratiodirection findingdistancedomestic wiringearth wireeffective lengthefficiencyelectric generatorelectric motorelectrical safetyelectromagnetelectromagnetic inductionenergy conversionflux changeforce on conductorfrequencyfusefuse ratinggalvanometerideal transformerinduced EMFinduced currentlive wireloss reductionmagnetic effectmagnetic effect of currentmagnetic fieldmagnetic field at centremagnetic field formulamagnetic field linesmagnetic field strengthmagnetic fluxmagnetic forcenumber of turnsoverloadingparallel circuitparallel conductorsparallel connectionpeak EMFpeak voltagepermanent magnetpolarity reversalpolespowerpower calculationpower losspower transmissionpropertiesrate of changerelative motionrotation speedrpm conversionshort circuitsinusoidal EMFslip ringssoft iron coresolenoidstep-upstep-up transformerstraight conductortorquetorque on coiltransformertransmission efficiencytransmission lossturnsturns and radiusturns ratiovoltage and loss

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