ICSE Class 10 Electromagnetism — practice questions
20 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice ICSE Class 10 Electromagnetism in the app →Oersted's 1820 experiment showed that an electric currentThe direction of magnetic field around a straight current-carrying wire is given byA coil of wire wound many turns and carrying current becomes a magnet calledThe SI unit of magnetic flux density (field B) is theFleming's left-hand rule applies toIn a d.c. electric motor, the function of the split-ring commutator is toIn a d.c. motor the energy transformation isIn an a.c. generator the energy transformation isElectromagnetic induction is the phenomenon in whichThe frequency of household a.c. supply in India isAn advantage of a.c. over d.c. for power transmission is thatA step-up transformer hasA step-down transformer with 1000 primary turns and 100 secondary turns connected to 220 V a.c. gives an outpuAn electromagnet differs from a permanent magnet because itThe strength of an electromagnet can be increased byIn Fleming's left-hand rule the thumb representsThe d.c. motor uses which rule to predict the direction of rotation?In a transformer the primary and secondary coils are usually wound aroundInduction is greater in a coil whenIn an a.c. generator, the slip-rings serve to