Graphic pen recorder
Electron microscope
X-Y recorder
Oscilloscope
Answer is Wrong!
Answer is Right!
The correct answer is: A. Graphic pen recorder
A graphic pen recorder is a device that produces a paper record of an analog waveform. It is usually used to measure and record electrical signals, such as those produced by a heart monitor or an oscilloscope. The pen recorder consists of a moving pen that traces the waveform on a piece of paper. The paper is moved past the pen at a constant speed, and the pen is controlled by an electronic circuit that converts the analog signal into a series of electrical pulses. The pulses cause the pen to move up and down, creating a record of the waveform on the paper.
The other options are incorrect because:
- An electron microscope is a device that uses a beam of electrons to create an image of a very small object.
- An X-Y recorder is a device that plots the relationship between two variables, such as voltage and time.
- An oscilloscope is a device that displays a visual representation of an electrical signal.