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The de-Broglie wavelength of an electron in the first Bohr orbit is

1. Equal to one fourth the circumference of the first orbit
2. Equal to half the circumference of the first orbit
3. Equal to twice the circumference of the first orbit
4. Equal to the circumference of the first orbit (SECTION-B)

Correct answer: Equal to the circumference of the first orbit (SECTION-B)

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