What are the advantages of using electricity for lights and other electrical equipment only when they are needed

Uncle grandma

Ireally just need to get finished with precal! i’m really sorry i have to do this! hope this !

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

Answer///(d) atoms contain small,negatively charged particles;