A positively charged particle projected towards west is deflected towards north by a magnetic field. State the direction of magnetic field. Which rule did you use to find direction?
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This might get you started:
http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/magfie.html
To determine the direction of the magnetic field, we can use the right-hand rule. Here's how to do it:
1. Extend your right hand and make a thumbs-up gesture.
2. Point your thumb in the direction of the velocity of the positively charged particle, which is towards the west in this case.
3. Extend your fingers perpendicular to your palm. The direction they curl represents the magnetic field direction.
4. Since the particle is deflected towards the north, the magnetic field is directed from your palm towards your fingers, which corresponds to the eastward direction.
In summary, if a positively charged particle projected towards the west is deflected towards the north by a magnetic field, the magnetic field must be directed towards the east.