Q8. What angle is used to find the magnetic force at points a and b ? What is the direction of the magnetic force on an electron at a and b? The red arrows are velocity. Q10. What are the signs of the charges of each particle? Q12. Each wire carries 10 A of current. What is the magnitude and direction of the magnetic field at point P? Q3. What is the direction of the magnetic field at point P in the figure? (P is on the axis of the coil) Q4. What is the direction of the magnetic force on a PROTON at each point indicated? Q5. What is the direction of the magnetic force on an ELECTRON at each point indicated?