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# Connecting an Ammeter in Circuit

EANDM-7CUSC5

You wish to measure the current in the DC circuit shown below; your lab mate connects the ammeter as shown below.

Which of the following is the BEST explanation of what will happen when the switch $S$ is closed?

A

Nothing will happen; the ammeter is in series with the circuit. For current to be measured, the ammeter must be in parallel with the circuit.

B

The arrow on the meter will move to the right, ​and the arrow will point to the current in the circuit, as desired.

C

The arrow on the ammeter will move to the left causing the ammeter to read "negative" current​.

D

The ammeter is not connected properly, and it will not measure current but instead​ the voltage drop between the two resistors.