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33. What is a solenoid? Draw the pattern of magnetic field lines of (1) a current carrying solenoid and (ii) a bar magnet. List two distinguishing features between the two fields?​

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Answer: The solenoid is a long cylindrical coil of wire consisting of a large number of turns bound together very tightly.

The length of the coil should be longer than its diameter.

Magnetic field around a current carrying solenoid is shown in figure. These appear to be similar to that of a bar magnet.

When soft iron rod is placed inside the solenoid, it behaves like an electromagnet. The use of soft iron as core in the solenoid produces the strong magnetism.

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