An EEG, or electroencephalograph
The medical term is electroencephalograph (EEG), which is a device used to measure the electrical activity of the brain.
A cardiograph is an instrument designed to measure and record the electrical activity of the heart.
What instrument do we use to measure the electrical and mechanical vibrations
The electrical activity of the heart.
An electrical ammeter.
An electroencephalogram (EEG) is the most common instrument used to measure brain activity by recording electrical patterns in the brain. EEG is non-invasive and helps in diagnosing conditions like epilepsy, sleep disorders, and brain injuries.
a microphone is the best answer to that!!
Frequency counter
The electrical activity of the heart over time.
The wattmeter is an instrument to measure the electrical power.
An Ammeter is used to measure electrical current, which is measured in Amperes (or Amps).
The instrument is used to measure the optical activity of a sample.
Either an ammeter or a galvanometer is.