Question

Assertion (A): In a conductor, current density remains constant in time as long as E is constant.

Reason (R): In a conductor, J = σE.

a.

Both A and R are true and R is correct explanation of A

b.

Both A and R are true but R is not correct explanation of A

c.

A is true but R is false

d.

A is false but R is true

Posted under Electronics and Communication Engineering

Answer: (a).Both A and R are true and R is correct explanation of A

Interact with the Community - Share Your Thoughts

Uncertain About the Answer? Seek Clarification Here.

Understand the Explanation? Include it Here.

Q. Assertion (A): In a conductor, current density remains constant in time as long as E is constant. Reason (R): In a conductor, J = σE.
Add Comment

Similar Questions

Explore Relevant Multiple Choice Questions (MCQs)

Q. Hysteresis curve is associated with motion of domain walls.

View solution

Q. The number of protons in germanium atom is

View solution

Q. Sulphur hexafluoride is used in

View solution

Q. The number of valence electrons in trivalent impurity is

View solution

Q. Soft iron is suitable for making temporary magnets.

View solution

Q. Antiferromagnetic materials do not have permanent dipoles.

View solution

Q. The Ohm's law for conduction in metals is

View solution

Q. The measurement of Hall coefficient of a semiconductor with one type of charge carriers gives the information about

View solution

Q. ∈₀ has no other physical meaning than that of a fundamental conversion factor.

View solution

Q. Which of the following is used in temperature alarm circuits?

View solution

Q. n type semiconductors

View solution

Q. The most important primary force of attraction in the formation of solids is

View solution

Q. When two conductors carry currents in the same direction the force is repulsive.

View solution

Q. The number of turns in a coil is doubled. If initial time constant is T, the new time constant is

View solution

Q. When a trivalent impurity is added, the semiconductor becomes

View solution

Q. Iron has a body centred cubic structure.

View solution

Q. The units of polarization of dielectric are

View solution

Q. When a potential is applied across an intrinsic semiconductor, holes flow

View solution

Q. For magnetic shielding, we need a ferromagnetic material.

View solution

Q. Assertion (A): Electronic polarizability increases as atoms becomes larger.

Reason (R): For rare gas, ∈₀(∈ᵣ - 1) E = Nαe, where N is number of atoms/m³ and αe is electronic polarizability of material.

View solution
View All MCQs on Electronics and Communication Engineering

Recommended Subjects

Are you eager to expand your knowledge beyond Electronics and Communication Engineering? We've handpicked a range of related categories that you might find intriguing.

Click on the categories below to discover a wealth of MCQs and enrich your understanding of various subjects. Happy exploring!

Dairy Engineering

Dive into the world of Dairy Engineering with our specialized category. Explore the...

Mechanical Engineering

Explore the world of Mechanical Engineering with our specialized category. Dive into...

Engineering Geology

Explore the dynamic field of Engineering Geology with our specialized category. Delve...

Food Engineering

Explore the fascinating world of Food Engineering with our specialized category....

Biochemical Engineering

Master the synergy of biology and engineering with our Biochemical Engineering...

International Relations

Navigate the complex world of International Relations with our dedicated category....

Automotive Engine Design

Embark on a thrilling exploration of Automotive Engine Design, where the intricacies...

IC 92 Actuarial Aspects of Product Development

Sharpen your understanding of actuarial principles in product development with our...

Optical Communication

Explore the world of high-speed data transmission with our Optical Communication...