بالنسبة للسؤال الثانى
Both the electric field and magnetic field can be defined from the Lorentz force law:The electric force is straigtforward, being in the direction of the electric field if the charge q is positive, but the direction of the magnetic part of the force is given by the right hand rule.
f :i s the electric force
B:is themagnetic field
E: is the electric field
q:is the charge
v: is the velocity
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تحياتى ..
مواقع النشر (المفضلة)