HELP ME Two particles are separated by 0.38 m and have charges of -6.25*10-9 C and
2.91 x 10-9 C. Use Coulomb's law to predict the force between the particles if
the distance is doubled. The equation for Coulomb's law is Fe = kq,92, and
the constant, k, equals 9.00 x 10°Nm2c2

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