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

This section includes 4 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.

In a water drop of radius 1 mm all the molecular dipole points are in the same direction. If the dipole moment of a water molecule is 6 X 10-30 m, the polarization in the water drop is _____________

A. 6.4 X 10-13 m-2
B. 7.4 X 10-13 m-2
C. 8.4 X 10-13 m-2
D. 9.4 X 10-13 m-2
Answer» D. 9.4 X 10-13 m-2
Discussion
2.

The dielectric constant of helium is 1.000684. If N is 2.7 X 1025 atoms/m3, what is the radius of the electronic cloud?

A. 3.78 X 10-11 m
B. 4.65 X 10-11 m
C. 5.87 X 10-11 m
D. 6.12 X 10-11 m
Answer» D. 6.12 X 10-11 m
Discussion
3.

An oxygen atom produced a dipole moment of 5 X 10-23 cm when subjected to an electric field. If the separation between the center of electronic cloud and the nucleus is 4 X 10-17 m, what is the polarizability of the oxygen atom?

A. 1.4 X 10-47 Fm2
B. 1.7 X 10-47 Fm2
C. 1.8 X 10-47 Fm2
D. 1.9 X 10-47 Fm2
Answer» E.
Discussion
4.

Which polarizability is the ionic polarizability?

A. αa
B. αb
C. αc
D. αd
Answer» D. αd
Discussion