small bulb: 0mA

gold bulb: 2mA

silver bulb: 0mA

tall bulb: 0.5mA

Questions:

which circuit had the largest current?

The gold bulb

Which circuit had the smallest current?

The small bulb and the silver bulb both didn’t do anything

What is the purpose of the switch in this circuit?

The switch permits the current to continue to the bulb when it’s on and its doesn’t when it’s off.

When you measure an unknown current, you start with the meter set to a large current scale and then decrease the scale. Explain the purpose of starting with a higher setting.

The purpose is to increase the chances of the bulb lighting up.