Calculate the gravitational force between an astronaut (mass of 225kg) and mars (mass of 6.39x1023 kg) when the astronaut is on the
surface of the planet.
use the g. u.e. s.s. method to show your work to earn credit.
(radius of mars = 3 39x106m)

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