विल द कंपास नीडल शो रिफ्लेक्शन व्हेन द सीरीज इन द सर्किल शो बाय सिक्स क्लास ans in English
Answers
Answer:
The polarity of the magnetic field (that is, which end is magnetic-north or magnetic-south) can easily be found from the Right hand thumb rule. If we hold the solenoid in our right hand, so that the fingers curl around it in the direction of the conventional current flow, then the thumb will point to the north pole of the magnet. Also, a solenoid when suspended freely, aligns itself in the north-south direction, thus behaving like a bar magnet. One end of the solenoid acts like a north pole and the other end the south pole.
When magnetic compass with the north end is brought closer to the 1st end of the solenoid, the needle deflects towards the west, that is, away from the solenoid because the magnetic compass that is pointing in the direction of the earth's magnetic field, i.e. north- south direction repels with the north pole of current carrying solenoid. Like poles repel each other. Thus, the needle of the compass will rest in the direction of magnetic field corresponding to the solenoid at that point.