A-LevelPhysicsAlternating currentsFeb/Mar 2018Paper 1 Q61 Mark
A cathode-ray oscilloscope (c.r.o.) is connected to an alternating voltage. The following trace is produced on the screen. [Figure 6.1] The oscilloscope time-base setting is 0.5 ms cm⁻¹ and the Y-plate sensitivity is 2 V cm⁻¹. Which statement about the alternating voltage is correct?
AThe amplitude is 3.5 cm.
BThe frequency is 0.5 kHz.
CThe period is 1 ms.
DThe wavelength is 4 cm.
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The correct answer is B. This question tests the candidate's understanding of alternating currents within the Physicssyllabus. The examiner's mark scheme requires...
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