A civil engineer is to design a road curve at a 189 m radius to carry racing cars traveling at 22 m/s. µ = 0.2 θ At what angle θ should it be banked for maximum control of the racing car? The coefficient of friction of the surface is 0.2 and the acceleration due to gravity is 9.8 m/s 2 . Answer in units of ◦ .

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

The answer is: 6.3mi got it right