Q. The drawing shows an equilateral triangle, each side of which has a length of 2.00 cm. Point charges are fixed to each corner, as shown. The +4.0 C charge experiences a net force due to the charges qA and qB. This net force points vertically downward and has a magnitude of 405 N. Determine the magnitudes and algebraic signs of the charges qA and qB
Q. A long solenoid has 1470 turns in a length of 40.0 cm. What current has to flow through the solenoid in order to generate a magnetic field of 3.45 μT in its interior?