The correct answer is: B. X-Y recording.
X-Y recording is a method of recording data that uses two axes, one for the independent variable and one for the dependent variable. The data is typically recorded on a piece of paper or film that is moved past a stylus, which traces the data points.
Magnetic tape recording is a method of recording data that uses a magnetic tape. The data is recorded on the tape as a series of magnetic fields. The tape can then be played back to read the data.
Galvanometric recording is a method of recording data that uses a galvanometer. The galvanometer is a device that measures electric current. The current is converted into a voltage, which is then used to move a pen or stylus. The pen or stylus traces the data points on a piece of paper or film.
PMMC writing systems are a type of galvanometer recording system. They use a permanent magnet moving coil (PMMC) galvanometer to measure electric current. The current is converted into a voltage, which is then used to move a pen or stylus. The pen or stylus traces the data points on a piece of paper or film.
Stress and strain curves are typically plotted using X-Y recording. This is because X-Y recording allows for the accurate measurement of both the stress and strain values. The data can then be used to calculate the Young’s modulus, which is a measure of the stiffness of the material.