Physics
Draw a labelled diagram to make a soft iron bar as an electromagnet. Describe in steps the procedure.
Answer
- Take a soft iron bar PQ and wind a thin insulated copper wire around the bar.
- Connect a cell or a battery and a key K in series between the ends of a coil as shown in the below figure.
- When key is closed current passes through the winding of the coil and the bar becomes a magnet.
- But when key is opened the current stops flowing in the coil and bar gets demagnetized.
So, soft iron bar behaves as an electromagnet when current passes through the coil.
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