TNPSC Group 2 General Science Study Material in English Pdf - 1

Question: 1

The electrolyte in a car battery is

(A) Nitric acid

(B) Distilled water

(C) Sulphuric acid

(D) Hydrochloric acid

Ans: C

Sulphuric acid

Question: 2

The frequency band used for radar relay-systems and television is

(A) UHF

(B) VLF

(C) VHF

(D) EHF

Ans: A

UHF

Question: 3

A diode as a rectifier converts

(A) High voltage into low voltage and vice-versa

(B) Varying DC into constant dc

(C) DC to AC

(D) AC to DC

Ans: D

AC to DC

Question: 4

Resistivity of semiconductor depends

(A) Atomic nature of semiconductor

(B) Shape and atomic nature of semiconductor

(C) Shape of semiconductor

(D) Length of semiconductor

Ans: A

Atomic nature of semiconductor

Question: 5

A transistor is made of

(A) Intrinsic semiconductors

(B) Doped semiconductors

(C) A metal piece sandwiched between two intrinsic semiconductors

(D) None of the above

Ans: B

Doped semiconductors

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