Answer:
A
Explanation:
if it was B it would say from one to another to another
Answer:
(a) The current should be in opposite direction
(b) The current needed is 39.8 A
Explanation:
Part (a)
Based, on right hand rule, the current should be in opposite direction
Part (b)
given;
strength of magnetic field, B = 370 µT
distance between the two parallel wires, d = 8.6 cm

At the center, the magnetic field strength is twice

R = d/2 = 8.6/2 = 4.3 cm = 0.043 m

Therefore, current needed is 39.8 A
I think you can just sub the values in? unless the qn is asking for smth else?
Answer:
the two factors are the mass of the objects and the coefficient of friction between them
Explanation:
internet :)