Current Electricity 1 Question 18
18. Read the following statements carefully
(1993, 2M)
Select the correct statement (s) from the following
(a)
(b)
(c) Both
(d)
Show Answer
Solution:
- Resistivity of conductors increases with increase in temperature because rate of collisions between free electrons and ions increase with increase of temperature. However, the resistivity of semiconductors decreases with increase in temperature, because more and more covalent bonds are broken at higher temperatures.
