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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To determine the direction of the magnetic field, you can use the right-hand rule. The right-hand rule can be used to determine the direction of magnetic force acting on a moving charged particle.
The right-hand rule states that if you point your right thumb in the direction of the velocity of the positively charged particle, and your fingers in the direction of the magnetic field, then the force on the particle will be in the direction perpendicular to both your thumb and fingers.
In this case, the positively charged particle is projected towards the west and is deflected towards the north. Therefore, you can do the following:
1. Extend your right hand and point your thumb towards the west (opposite to the direction of particle's motion).
2. Curl your fingers towards the north (in the direction of the deflection).
3. The direction in which your extended palm faces will represent the direction of the magnetic field.
So, using the right-hand rule, the direction of the magnetic field would be towards the east.