1. Explain what it means when we say a substance is magnetic. 2. Discuss the relationship between electric and magnetic fields.
3. Which type of wires (copper, aluminum, or string) are ferromagnetic metals?
4. Open the lab interactive and run a few trials changing the variables each time. Decide which
variable you want to change in order to make a strong electromagnet and record it here. This
will be your independent variable

Ithink the answer is c but then again i'm probably wrong

The objects are acted upon by only one force. gravity. mass times the acceleration of gravity (-9.81meters/second squared).

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