wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

Which of the following must be there in materials that make good electrical insulators?

A
very few, if any, free electrons
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
high conductivity
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
low conductivity
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
more than 10 electrons
No worries! We‘ve got your back. Try BYJU‘S free classes today!
E
energetic electrons
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is C very few, if any, free electrons
Free electrons in a material increases the mobility of flowing electrons into the material. It increases the number of electrons that flow when same potential difference is applied, hence higher current and lower resistance.
Thus the conductivity of material decreases if it lacks free electrons and makes it an electrical insulator.

flag
Suggest Corrections
thumbs-up
1
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Electric Field inside a Conductor
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon