Final answer:
The vacuum gauge should be located in the area where the vacuum reading is needed, such as in a vacuum chamber.
Step-by-step explanation:
The vacuum gauge should be located in the area where the vacuum reading is needed. In most cases, this would be in the vacuum chamber or the area where the pressure is being measured. The gauge is designed to measure negative pressure, so it will give accurate readings when placed in a vacuum. For example, in a physics experiment using a vacuum chamber, the gauge should be connected to the chamber to measure the pressure inside. The pressure gauge on the chamber will read a negative value due to the reduced pressure inside the chamber.