Calculating amplitude from oscilloscope deflection and y-gain Steps:

• Note the y-gain setting: 5 V/cm (each cm vertical deflection corresponds to 5 V).
• From the diagram, measure the peak-to-peak vertical deflection of the wave: 2.8 cm.
• Calculate peak-to-peak voltage: 2.8 cm × 5 V/cm = 14 V.
• Determine amplitude as half the peak-to-peak voltage: 14 V / 2 = 7 V. Why C is correct:
• Amplitude is defined as the maximum displacement from the rest position, which is half the peak-to-peak voltage after scaling by y-gain. Why the others are wrong:
• A: Underestimates by confusing y-gain units or deflection measurement.
• B: Possible error in halving an incorrect peak-to-peak value like 7 V.
• D: Mistakenly takes peak-to-peak voltage (14 V) as the amplitude instead of halving it. Final answer: C