How should voltage be safely measured in a circuit?

Voltage should be safely measured in a circuit using a voltmeter with probes positioned correctly while ensuring the circuit is safe to test. This approach allows for accurate measurements while minimizing the risk of electrical shock or damage to the measuring instrument. Properly positioning the probes is crucial, as it prevents short circuits and ensures that the voltage readings reflect the actual performance of the circuit.

Additionally, checking that the circuit is safe to test—confirming that there are no exposed conductors and that the device is in good working order—is essential for safety. Following these practices ensures that the measurement can be taken without putting oneself or the equipment at risk.

Using a multimeter without proper safety precautions, directly touching wires, or using an oscilloscope without disconnecting power are methods that compromise safety and may lead to inaccurate readings or hazardous situations.