Electronics and Communication Engineering - Electronic Devices and Circuits - Discussion

Discussion Forum : Electronic Devices and Circuits - Section 2 (Q.No. 8)

Electronic Devices and Circuits

In all metals

conductivity decreases with increase in temperature

current flow by electrons as well as by holes

resistivity decreases with increase in temperature

the gap between valence and conduction bands is small

Answer: Option

Explanation:

In all metals conductivity decreases (and resistance increases) with increase in temperature.

Discussion:

3 comments Page 1 of 1.

Dankan V Gowda said: 9 years ago

Metals have positive temperature co-efficients i.e. when the temperature increases its resistivity increases, therefore conductivity decreases.

Prachi said: 9 years ago

Thank you @Nimit Gandhi.

Nimit gandhi said: 1 decade ago

Because in metal with temperature rise the quantum vibrations(Phonon) are increases and it will directly affect the flow of electron.

Post your comments here:

Quick links

Quantitative Aptitude

Verbal (English)

Reasoning

Programming

Interview

Placement Papers