Q. According to the Bohr's theory of hydrogen atom, the speed of the electron, energy and the radius of its orbit vary with the principal quantum number , respectively, as

VITEEE VITEEE 2010 Report Error

A

B

C

D

Solution:

According to Bohr's theory of hydrogen atom,
(i) The speed of the electron in the orbit is

or
(ii) The energy of the electron in the nth orbit is

or
(iii) The radius of the electron in the nth orbit is

where , is called Bohr's radius,
or

Questions from VITEEE 2010

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4. In a double slit experiment, dark fringe is formed opposite to one of the slits, the wavelength of light is

5. Which of the following rays is emitted by a human body?

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