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PQ is a solenoid. A magnetic needle is placed near the end ‘Q’ of the solenoid as shown in the figure. The solenoid acts as a bar magnet when current flows through it.(a) When the circuit is switched on, which pole of the magnetic needle is attracted towards Q ? (b) How did you arrive at this conclusion ? (c) Write any two methods to increase the magnetic strength of a current carrying solenoid ? |
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Answer» (a) South pole. (b) When compass is brought near the solenoid (acting as a bar magnet), its magnetic field of lines interact with that of the solenoid, like poles repel each other. (c) (i) Increases the number of turns in a solenoid (ii) Increases the current through the solenoid. |
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