The drawing shows an a-shaped ladder. both sides of the ladder are equal in length. this ladder is standing on a frictionless horizontal surface, and only the crossbar (which has a negligible mass) of the "a" keeps the ladder from collapsing. the ladder is uniform and has a mass of 14.2 kg. determine the tension in the crossbar of the ladder.

English can you write this in english do we can you

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