Explore topic-wise MCQs in Engineering Physics.

This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Physics knowledge and support exam preparation. Choose a topic below to get started.

1.

Between which two layers, population inversion takes place?

A. E1 and E2
B. E1 and E3
C. E2 and E2
D. Neither energy levels
Answer» B. E1 and E3
Discussion
2.

What will be the relative population of atoms in a ruby layer that produces a light beam of frequency 6 X 1014 Hz at 300 K.

A. e-85
B. e-90
C. e-95
D. e-100
Answer» D. e-100
Discussion
3.

What will be the relative population of atoms in a ruby layer that produces a light beam of wavelength 6943 Å at 300 K.

A. 5 X 10-31
B. 6 X 10-31
C. 7 X 10-31
D. 8 X 10-31
Answer» E.
Discussion
4.

To achieve optical amplifications, it is essential to create a non-equilibrium distribution of atoms.

A. True
B. False
Answer» B. False
Discussion
5.

At the state when N1 > N2, the intensity of light wave _____________

A. Increases linearly
B. Increases exponentially
C. Decreases linearly
D. Decreases exponentially
Answer» E.
Discussion
6.

During pumping, the atoms are exited to ___________

A. Higher Exited States
B. Lower Energy states
C. Meta Stable states
D. Not Excited
Answer» D. Not Excited
Discussion
7.

The ratio of N2 and N1 is given by ___________

A. e\(\frac{-hv}{kT}\)
B. e\(\frac{hv}{kT}\)
C. e\(\frac{-hv}{T}\)
D. e\(\frac{hv}{T}\)
Answer» B. e\(\frac{hv}{kT}\)
Discussion
8.

The relationship between N1 and N2 for stimulated emission to be dominant is ___________

A. N1 = N2
B. N1 > N2
C. N2 > N1
D. No such relationship
Answer» D. No such relationship
Discussion
9.

During Population inversion, which of the following processed is dominant?

A. Stimulated Absorption
B. Stimulated Emission
C. Spontaneous Emission
D. Spontaneous Absorption
Answer» C. Spontaneous Emission
Discussion