Top 10,000+ TNPSC MCQS - 1

Question: 1

A transformer works with

(A) Direct current

(B) Alternating current

(C) Any signal

(D) Both AC and DC

Question: 2

The conductivity of superconductor is

(A) Infinite

(B) Very large

(C) Very small

(D) Zero

Question: 3

A digital signal possesses

(A) Only four discrete values

(B) Continuously varying values

(C) Only two discrete values

(D) None of the above

Question: 4

Modern communication systems use

(A) Combination of analog and digital circuits

(B) Digital circuits

(C) Analog circuits

(D) None of the above

Question: 5

An oscillator is nothing but an amplifier with

(A) Negative feedback

(B) No feedback

(C) Large gain

(D) Positive feedback