Question

which are potential sources of error in the experiment? check all that apply.
variable amounts of metal and magnetic properties of a material
holding the compass at an angle
the color of the bar magnet
unseen magnetic fields (such as from an electrical appliance)
the brand of light bulb used in the circuit
using a dead battery in the circuit

Explanation:

• Variable amounts of metal and magnetic properties can affect magnetic interactions. Holding the compass at an angle can misalign readings. Unseen magnetic fields interfere with the experiment. A dead battery stops current flow (if relevant to the experiment). The color of the magnet and the brand of the light - bulb (assuming no magnetic or electrical property differences due to brand) are not relevant sources of error.

Answer:

variable amounts of metal and magnetic properties of a material, holding the compass at an angle, unseen magnetic fields (such as from an electrical appliance), using a dead battery in the circuit