two parallel wires carry current i1 and i2, respectively, with positive current

Question

two parallel wires carry current i1 and i2, respectively, with positive current to the right. The charge q is positive and has velocity v to the right.

Which of the following statements are true?
A) If v = 0, then the force on q is zero.
B) If i1 = 0 and i2 is greater than zero, then the magnetic field near charge q points into the page.
C) If i2 = 0 and i1 is greater than zero, then the force on q points into the page.
D) If i1 = - i2, then the wires repel each other.
E) If i1 is greater than i2, then the force on q is north.
F) If i1 = - i2, then the force on q is zero.
G) If i2 = 0 and i1 is greater than zero, then the force on q is north.

Explanation / Answer

1)True 2)false . Magnetic field points into the page. 3)false. Because net magnetic force adds up. 4)false . It is towards north 5) true. magnetic force acts only on moving particles 6)true 7)True . The wires will repel

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