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25 questions
11
Conductivity
Moderate
+1.0
-0.25
At which temperature superconductivity can be of tremendous economic interest saving billions of rupees?
12
Conductivity
Moderate
+1.0
-0.25
The newly discovered high temperature superconductors are –
13
Conductivity
Moderate
+1.0
-0.25
The conductivity of a semiconductor at zero Kelvin is–
14
Conductivity
Moderate
+1.0
-0.25
The resistance of a semiconductor on heating :
15
Conductivity
Moderate
+1.0
-0.25
On heating, the resistance of a semiconductor :
16
Conductivity
Moderate
+1.0
-0.25
Electric conduction in a semiconductor takes place due to–
17
Conductivity
Moderate
+1.0
-0.25
Which of the following technique cannot be used for generating electron-hole pairs in electronic devices?
18
Conductivity
Moderate
+1.0
-0.25
At absolute zero temperature, the electric resistance in semiconductor is–
19
Conductivity
Moderate
+1.0
-0.25
Which one of the following metals is used as semiconductor in transistors?
20
Conductivity
Moderate
+1.0
-0.25
The most commonly used material for making transistors is—