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(a)Whatis an electromagent? Draw a circuitdiagram to showhow a soft iron piece can betransformed into an electromagnet ? (b) Statetwo waysby whichthe strenghtof an electromagnetcan be increased. |
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Answer» Solution :(a) An electromagentis a ROD of magnetic(say soft iron) placedinsidea solenoidcoil . On passingcurrentin solenoidcoil , ion rodbegins to BEHAVE as a magnet. Onstoppingthe CURRENTFLOW, magnetisationof iron is lost . Thus , a soft iron piece behaveas an electromagnet . (b) Thestrenghtofan electromagnetcan beinscreased by . (i) increasingthe amountof turnsofwinding ofthe solenoid coil wrapped around theelectromagnetor . (ii)increasingthe amountof electric CURRENT flowingthrough the coil. |
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