Explore topic-wise MCQs in Engineering Physics Questions and Answers.

This section includes 5 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Physics Questions and Answers 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.

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
5.

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