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# Answer the Following: You Are Given a Thread and a Metre Scale. How Will You Estimate the Diameter of the Thread? - Physics

#### Question

You are given a thread and a metre scale. How will you estimate the diameter of the thread?

#### Solution 1

Wrap the thread on a uniform smooth rod in such a way that the coils thus formed are very close to each other. Measure the length of the thread using a metre scale. The diameter of the thread is given by the relation,

Diameter = "Length of thread"/"Number of turns"

#### Solution 2

Wrap the thread a number of times on a round pencil so as to form a coil having its turns touching each other closely. Measure the length of this coil, mode by the thread, with a metre scale. If n be the number of turns of the coil and l be the length of the coil, then the length occupied by each single turn i.e., the thickness of the thread = 1/n. This is equal to the diameter of the thread

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