Explore topic-wise MCQs in NTPC (Technical Ability).

This section includes 7 Mcqs, each offering curated multiple-choice questions to sharpen your NTPC (Technical Ability) knowledge and support exam preparation. Choose a topic below to get started.

1.

The number of diodes required in a bridge rectifier circuit is

A. one
B. two
C.  Low and low
D. four
Answer» E.
Discussion
2.

The number of valence electron in boron is

A. 1   
B. 2
C.  Either of these  
D. 5
Answer» D. 5
Discussion
3.

The addition of trivalent impurity to an intrinsic semiconductor creates

A. N-type semiconductor
B. excess free electrons
C.  cross-magnetizing
D. electron-hole pairs  
Answer» D. electron-hole pairs  
Discussion
4.

Dynamic resistance is the ratio of

A. change in drain-source voltage and change in drain current at constant   \[{{V}_{GS}}\]
B. change in gate-source voltage and change in drain current at constant   \[{{V}_{DS}}\]  
C.  Reduce eddy current loss
D. gate-source voltage and drain current
Answer» B. change in gate-source voltage and change in drain current at constant   \[{{V}_{DS}}\]  
Discussion
5.

  One disadvantage of directly coupled transistor amplifier

A. identical transistors are required
B. both NPN transistors are required 
C.  Both 1 and 2
D. the low frequency response is poor
Answer» D. the low frequency response is poor
Discussion
6.

  In a semiconductor, the movement of holes is due to

A. movement of electrons in conduction band 
B. movement of holes in conduction band   
C.  Low starting current and moderate starting torque
D. movement of electrons in valence band   
Answer» E.
Discussion
7.

Vacuum tubes in a radio transmitter are used to

A. record programmes
B. d. c. supply
C.  Field test
D. none of these
Answer» D. none of these
Discussion