Current Electricity and Electrical InstrumentHard
Question
Read the following statement carefully
Y : The resistivity of semiconductor decreases with increase of temperature
Z : In a conducting solid, the rate of collisions between free electrons and ions increases with increase of temperature
Y : The resistivity of semiconductor decreases with increase of temperature
Z : In a conducting solid, the rate of collisions between free electrons and ions increases with increase of temperature
Options
A.Y is true but Z is false
B.Y is false but Z is true
C.Both Y and Z are true
D.Y is true and Z is the correct reason for Y
Solution
Resistivity of condcutors increases with increase in temperature because rate of collisions between free electrons and ions increases with increase of temperature. However, the resistivity of semiconductors decrease with increase in temperature, because more and more covalent bonds are broken at higher temperature.
Create a free account to view solution
View Solution FreeTopic: Current Electricity and Electrical Instrument·Practice all Current Electricity and Electrical Instrument questions
More Current Electricity and Electrical Instrument Questions
Current sensitivity of a moving coil galvanometer is 5 div/mA and its voltage sensitivity (angular deflection per unit v...The truth table shown in figure is equivalent for :-...The conductivity of a super conductor is : -...Two resistances equal at 0oC with temperature coefficient of resistance α1 and α2 joined in series temperature...Statement-I : Higher the range, greater is the resistance of ammeter. Statement-II : To increase the range of ammeter, a...