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Which of the following is not an application of eddy currents?

1. Induction furnace
2. Galvanometer damping
3. Speedometer of automobiles
4. X-ray crystallography

Correct answer: X-ray crystallography

Solution

Eddy currents are used in induction furnaces, galvanometer damping, and automobile speedometers. X-ray crystallography is a technique for determining crystal structure using X-rays, not eddy currents. Hence it is not an application of eddy currents.

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