1000+ Physics GK Questions and Answers 2022-2023 - 2

Question: 6

Which of the following device is full duplex?

(A) Mobile phone

(B) Walky talky

(C) Loudspeaker

(D) Radio

Question: 7

A switch is always connected to the

(A) Earth wire

(B) Line wire

(C) Neutral wire

(D) None of these

Question: 8

Good resistance coils are made of

(A) Silver

(B) Gold

(C) Copper

(D) Manganin

Question: 9

No current flows between two charged bodies when connected

(A) If they have same capacity

(B) If they have the same quantity of charge

(C) If they have same potential

(D) None of the above

Question: 10

When the temperature of semiconductor is increased, its electrical conductivity

(A) Remains the same

(B) Increases

(C) Decreases

(D) None of these