Wires P and Q have the same resistance at ordinary (room) temperature. When heated, resistance of P increases and that of Q decreases. We conclude that

(a) P and Q are conductors of different materials

(b) P is N-type semiconductor and Q is P-type semiconductor

(c) P is semiconductor and Q is conductor

(d) P is conductor and Q is semiconductor

Concept Questions :-

Types of semiconductors
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


In extrinsic P and N-type, semiconductor materials, the ratio of the impurity atoms to the pure semiconductor atoms is about 
(a) 1                   (b) 10-1
(c) 10-4              (d) 10-7

Concept Questions :-

Types of semiconductors
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


The forbidden gap in the energy bands of germanium at room temperature is about 
(a) 1.1 eV                           (b) 0.1 eV
(c) 0.67 eV                         (d) 6.7 eV 

Concept Questions :-

Energy band theory
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


In P-type semiconductor the majority and minority charge carriers are respectively

(a) Protons and electrons           (b) Electrons and protons
(c) Electrons and holes               (d) Holes and electrons

Concept Questions :-

Types of semiconductors
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


At zero Kelvin a piece of germanium

(a) Becomes semiconductor

(b) Becomes good conductor

(c) Becomes bad conductor

(d) Has maximum conductivity

Concept Questions :-

Types of semiconductors
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


A semiconductor is cooled from T1K to T2K. Its resistance

(a) Will decrease
(b) Will increase
(c) Will first decrease and then increase
(d) Will not change

Concept Questions :-

Types of semiconductors
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


In intrinsic semiconductor at room temperature, number of electrons and holes are

(a) Equal                 (b) Zero
(c) Unequal              (d) Infinite

Concept Questions :-

Types of semiconductors
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


In a semiconductor the separation between conduction band and valence band is of the order of

(a) 100 eV                      (b) 10 eV
(c) 1 eV                          (d) 0 eV

Concept Questions :-

Energy band theory
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


The intrinsic semiconductor becomes an insulator at

(a) 0°C                  (b) -100°C 

(c)  300 K               (d) 0 K

Concept Questions :-

Types of semiconductors
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


In a good conductor the energy gap between the conduction band and the valence band is

(a) Infinite                        (b) Wide
(c) Narrow                        (d) Zero

Concept Questions :-

Energy band theory
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level: