To follow the instructions, close the key K, read and record the voltmeter reading V, and set the resistance in the resistor box to 10 ohms.
The resistance box is set to 10 ohms according to the question. To connect the circuit, you need to close the key K. With the key closed, you should read and record the voltmeter reading V.
To follow the instructions:
Close the key K
Read and record the voltmeter reading V
Set the resistance in the resistor box to 10 ohms