When using the right-hand rule to determine the direction of the magnetic force on a charge, which part of the hand points in the direction of the magnetic field? palm fingers back thumb

Magnetic field = fingers

Explanation:

Magnetic force is given by :

q is the electric charge

v is the velocity

B is the magnetic field

The direction of magnetic force is given by right hand rule. According to this rule, we have to point the thumb of your right hand in the direction of velocity and the fingers in the direction of magnetic field. The magnetic force must be perpendicular to v and B.      

Hence, the correct option is (c) " fingers "                                                                                                        

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it's a b and