Punjab 12th Class Physics Chapter 9 Atomic Spectra Mcqs Test Online
Questions 10
Total Marks 20
Time 10 Mins
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Punjab 12th Class Physics Chapter 9 Atomic Spectra Mcqs Test Online

Punjab 12th Class Physics Chapter 9 Atomic Spectra Mcqs Test Online

 

Question 1 of 10

Physics

1. According to Bohr’s theory the radius of quantized orbit is given by:
1.
2.
3.
4.

Question 1 of 10

Question 2 of 10

2. Laser is device which can produce:
1.
2.
3.
4.

Question 2 of 10

Question 3 of 10

3. Frequency of X-rays depends upon:
1.
2.
3.
4.

Question 3 of 10

Question 4 of 10

4. In accordance with Bohr’s theory the K.E, of the electron is equal to:

1.
2.
3.
4.

Question 4 of 10

Question 5 of 10

5. When an electron in an atom goes from a lower to higher orbit its:

1.
2.
3.
4.

Question 5 of 10

Question 6 of 10

6. For an atom of hydrogen atom the radius of the first orbit is given by:
1.
2.
3.
4.

Question 6 of 10

Question 7 of 10

7. Target material used in X-rays tube must have following properties:
1.
2.
3.
4.

Question 7 of 10

Question 8 of 10

8. If 13.6eV energy is required to ionize the hydrogen atom, then the required energy to remove an electron from n = 2 is:
1.
2.
3.
4.

Question 8 of 10

Question 9 of 10

9. The Balmer series is obtained when all the transition of electron terminate on:
1.
2.
3.
4.

Question 9 of 10

Question 10 of 10

10. In the Bohr’s model of the hydrogen atom, the lowest orbit corresponds to:
1.
2.
3.
4.

Question 10 of 10


 

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