100+ TNPSC Group 4 General Science Study Material in English Pdf - 1

Question: 1

A transformer works with

(A) Alternating current

(B) Direct current

(C) Both AC and DC

(D) Any signal

Question: 2

When the temperature of semiconductor is increased, its electrical conductivity

(A) Increases

(B) Decreases

(C) Remains the same

(D) None of these

Question: 3

In black and white televisions, pictures on the screen are produced due to bombardment of

(A) X-ray photons on a white screen

(B) X-ray photons on a white fluorescent screen

(C) Electrons on a white screen

(D) Electrons on a fluorescent white screen

Question: 4

The resistance of an ideal voltmeter is

(A) Zero

(B) Very low

(C) Very high

(D) Infinite

Question: 5

A switch is always connected to the

(A) Earth wire

(B) Neutral wire

(C) Line wire

(D) None of these