You are given a length of copper wire with a small diameter. The only instrument available ot you is the metre ruler. Explain how you would measure the diameter of the wire with an acceptable degree of accuracy.
Solution:
l = nd
l --length of coiled wire
n --number of turns
d --diameter
The thickness of the wire is its diameter
Example:There are 4 turns. The length of the coiled wire is 4 cm.
4 cm = 4 d
d = 1cm
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