# Electricity and Magnetism

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As part of a lab experiment, you are asked to measure the voltage across resistor $R_3$ and the total current in the circuit shown below. Your lab mate quickly connects the voltmeter (V) and the ammeter (A), as shown.
The resistances of the resistors are $R_1= 10.0 \Omega$, $R_2=20\Omega$, and $R_3= 30.0 \Omega$, and the voltage supplied is $10.0$ Volts.