Amicrobiologist tested 4 substances to find out if they would kill certain types of bacteria. the substances were applied to a plate
on which bacteria would normally grow. one week later, the scientist recorded the results in the diagram below.
legend
bacteria 1
sx
bacteria 2
si bacteria 3
substances applied bacteria growth
to the plate
1 week later
based on the diagram, which conclusion is most likely to be correct?
pls

The magnets would be | n s | and | s n|

Sorry i don’t know what to do

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