Question

To determine frequency of AC supply by CRO full experiment with procedure and detail.

Answer 1

1) Set appropriate time/division scale value to see a complete wave (assume the scale is 0.02 s/division)

2) Count how many divisions one full wave takes (assume, 20 divisions)

3) Multiply the number of divisions by the time/division factor to find the period, for example:

$$T=20·0.02=0.4\text{ s}.$$

4) Find the inverse of period to determine frequency, in our example:

$$f=\frac 1T=2.5\text{ Hz}.$$