AP® Physics 1 & 2

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Using Ohm's Law and Applying Uncertain Measurements


A single-cell battery is connected to a resistor valued at 33-ohms +/- 10%. An ammeter is inserted in series between the battery and the resistor. The ammeter has a three digit display that reads 0.02 amps.

Choose the correct statements regarding this circuit.

Select TWO answers.


The battery might produce a terminal voltage as high as 0.75 volts.


The voltage drop across the resistor is approximately 160 volts +/- 20 volts.


The actual value of the resistor migh tbe as high as 42 ohms.


An ammeter reading of 0.02 amps has a larger percent uncertainty than a reading of 0.08 amps