Measurement Techniques
19 questions· page 1 of 2
A loudspeaker produces a sound wave of constant frequency.
Outline how a cathode-ray oscilloscope (c.r.o.) may be used to determine this frequency.
Complete Fig. 4.1 with the name of an instrument that could be used to measure each of the quantities.
The time recorded by the student using a stop-watch is not equal to the time in (a).
Suggest three possible reasons, other than the effect of air resistance, for this difference.
1 ................................................................................................................................................
2 ................................................................................................................................................
3 ................................................................................................................................................
Describe the method used to obtain the required measurements.
Measurements of a constant current in a wire are taken using an analogue ammeter.
For these measurements, describe one possible cause of:
-
a random error
-
a systematic error.
Explain how the apparatus in Fig. 4.1 may be used to determine the load on the spring at the elastic limit.