MCQ Class 10 Science Chapter 12 Magnetic Effects Of Electric Current Advertisement MCQ’s For All Chapters – Science Class 10th 1. What should be the core of an electromagnet?rusted ironsoft ironhard ironnone of aboveQuestion 1 of 152. Who has stated the Right hand Thumb Rule?MaxwellOrstedFlemingEinsteinQuestion 2 of 153. The device used for producing electric current is calledmotorgeneratorgalvanometerammeterQuestion 3 of 154. To convert an AC generator into DC generatora rectangular wire loop has to be usedsplit-ring type commutator must be usedslip rings and brushes must be useda stronger magnetic field has to be usedQuestion 4 of 155. The most important safety method used for protecting home appliances from short circuiting or overloading isuse of electric meterearthinguse of stabilizersuse of fuseQuestion 5 of 156. We can induce the current in a coil byby changing the magnetic field around itmoving the coil in a magnetic fieldby changing the orientation of the coil in the magnetic fieldAll of aboveQuestion 6 of 157. A D.C generator works on the principle offaraday’s law of electromagnetic induction.Ohm's lawJoule’s law of heatingnone of the aboveQuestion 7 of 158. In the domestic electric circuits, the red coloured insulated copper wire is calledEarthing wireNeutral wireFuse wireLive wireQuestion 8 of 159. In electric motor, to make the coil rotating continuously in the same direction, current is reversed in the coil after every half rotation by a device calledarmaturecommutatorslip ringcarbon brushQuestion 9 of 1510. A positive charge is moving upwards in a magnetic field directed towards north. The particle will be deflected towardseastnorthwestsouthQuestion 10 of 1511. At the time of short circuit, the current in the circuitincreases heavilyvary continuouslyreduced considerablydoes not changeQuestion 11 of 1512. Inside the magnet, the field lines movesaway from north polefrom north to southfrom south the northaway from south poleQuestion 12 of 1513. Which device produces the electric current?motorgeneratorgalvanometerammeterQuestion 13 of 1514. Commercial electric motors do not usea soft iron core on which the coil is woundan electromagnet to rotate the armatureeffectively large number of turns of conducting wire in the current carrying coila permanent magnet to rotate the armatureQuestion 14 of 1515. Which one of the following correctly describes the magnetic field near a long straight wire?The field consists of radial lines originating from the wireThe field consists of straight lines perpendicular to the wire.The field consists of straight lines parallel to the wireThe field consists of concentric circles centered on the wireQuestion 15 of 15 Loading...
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