AIPMT 2012 Prelims | Atoms and Nuclei Question 54 | Physics

AIPMT 2012 Prelims

MCQ (Single Correct Answer)

-1

An electron of a stationary hydrogen atom passes from the fifth energy level to the ground level. The velocity that the atom acquired as a result of photon emission will be

$${{24hR} \over {25m}}$$

$${{25hR} \over {24m}}$$

$${{25m} \over {24hR}}$$

$${{24m} \over {25hR}}$$

AIPMT 2012 Prelims

MCQ (Single Correct Answer)

-1

Electron in hydrogen atom first jumps from third excited state to second excited state and then from second excited to the first excited state. The ratio of the wavelengths $$\lambda $$₁ : $$\lambda $$₂ emitted in the two cases is

$${7 \over 5}$$

$${27 \over 20}$$

$${27 \over 5}$$

$${20 \over 7}$$

AIPMT 2012 Prelims

MCQ (Single Correct Answer)

-1

Out of Syllabus

If the nuclear radius of ²⁷Al is 3.6 fermi, the approximate nuclear radius of ⁶⁴Cu in fermi is

2.4

1.2

4.8

3.6

AIPMT 2011 Mains

MCQ (Single Correct Answer)

-1

Out of the following which one is not a possible energy for a photon to be emitted by hydrogen atom according to Bohr's atomic model?

0.65 eV

1.9 eV

11.1 eV

13.6 eV

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