Question

Secondary emission results

a.

when temperature of metals is raised to a level above the crystallization temperature

b.

when metals are subjected to strong magnetic fields

c.

when light rays fall on the metal surface

d.

when a high velocity beam of electrons strikes as metal surface

Posted under Electronics and Communication Engineering

Answer: (b).when metals are subjected to strong magnetic fields

Interact with the Community - Share Your Thoughts

Uncertain About the Answer? Seek Clarification Here.

Understand the Explanation? Include it Here.

Q. Secondary emission results
Add Comment

Similar Questions

Explore Relevant Multiple Choice Questions (MCQs)

Q. Ohmic range of carbon composition resistors is

View solution

Q. The depletion layer consists of immobile ions.

View solution

Q. The output V-I characteristics of an Enhancement type MOSFET has

View solution

Q. A Darlington emitter follower circuit is some times used in the output stage of a TTL gate in order to

View solution

Q. Assertion (A): At room temperature the fermi level in p type semiconductor lies nearer to the valence band and in n type semiconductor it lies nearer to the conduction band.

Reason (R): At room temperature, the p type semiconductor is rich in holes and n type semiconductor is rich in electrons.

View solution

Q. The drift velocity of electrons and holes is proportional to electric field strength.

View solution

Q. In an n channel MOSFET, the substrate is connected

View solution

Q. Piezoelectric materials serves as a source of

View solution

Q. Pentavalent impurity creates n type semiconductor.

View solution

Q. When a BJT is operated under saturated condition

View solution

Q. Indium, aluminium, arsenic are all p type impurities.

View solution

Q. As the temperature of an intrinsic semiconductor material is increased

View solution

Q. The forbidden energy gap in semiconductors

View solution

Q. In commercial electron tubes the current produced by the cathode at 1000 K is about

View solution

Q. In a conductor the conduction and valence bands overlap

View solution

Q. In which of the following device electrons will be the majority carriers?

View solution

Q. An n channel JFET has IDS whose value is

View solution

Q. How is an N-channel junction Field Effect Transistor operated as an amplifier?

View solution

Q. Ferrites are

View solution

Q. The merging of a hole and an electron is called

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!

Drug and Pharmaceutical Biotechnology

Navigate the world of pharmaceuticals and biotechnology with our dedicated category....

Textile Engineering

Explore the dynamic world of Textile Engineering with our specialized category. Delve...

Engineering Materials

Discover the building blocks of engineering with our Engineering Materials category....

General Knowledge

Expand your horizons and stay informed about the world with our General Knowledge...

Avionics Engineering

Soar into the world of aviation technology with our Avionics Engineering category....

Enzyme Technology

Unlock the power of enzymes with our Enzyme Technology category. Explore enzyme...

Total Quality Management

Enhance your understanding of quality management with our Total Quality Management...

Business Statistics

Uncover the power of data analysis with our Business Statistics category. Explore...

Life Sciences

Delve into the diverse world of life sciences with our specialized category. Explore...