1) A device called a velocity selector containscrossedelectric and magnetic fields. It is designed to transmitparticleswith velocity
v entering the device perpendicularly toboth the electric andmagnetic fields without deflection. Themagnetic field is createdby permanent magnets and is uniform with aconstant magnitude of0.10 T.
(a) What magnitude of electric field would beneeded totransmit a beam of protons moving at 2.0 Ã105 m/swithoutdeflection? (Ans: 2.0 x10^ 4 V/m )
2) Two parallel wires of length 1.0 m areseparated by adistance of 1.0 cm. The wires each carry a steadycurrent of 20.0 Ain the same direction.
(a) What is the magnitude of the force between the wires? ( Ans:8.0x10^ -3 N )
(b) Is the force between the wiresattractive orrepulsive? PLEASE EXPLAIN(Ans: Attractive)