Starting from rest, a crate of mass m is pushed up a frictionless slope of angle theta by a horizontal force of magnitude f. use work and energy to find an expression for the crate's speed v when it is at height h above the bottom of the slope. express your answer in terms of the variables m, f, theta, h, and free fall acceleration g v=

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