An infinitely long thin wire carrying linear charge densityλis brought close to a semi-infiniteneutral conductor which covers space forx < 0. the wire is a distancedaway and is orientedso that it is parallel to they−axis. calculate the force per unit length that acts on thewire.

B. convex since the words are bigger

From negative to negative

Ibelieve the answer you're looking for is

Ohm's law tells you that i = v/r where v is equivalent voltage and r is equivalent resistance of the circuit
since all circuits have the same voltage, your question is really asking which circuit has the lowest total resistance, since the lower the resistance, the higher the current
circuit a has a resistance of 5 ohms; circuit c is in series so has a resistance of 10 ohms; circuit b is in parallel and therefore has a resistance of 2.5 ohms (review your notes on adding resistances in parallel and series); therefore b has the highest current