Online GK Quiz - 2

Question: 6

The expected energy of the electron at absolute zero is called

(A) Fermi energy

(B) Potential energy

(C) Work function

(D) Emission energy

Question: 7

Long distance short-wave radio broad casting uses

(A) Ground wave

(B) Ionospheric wave

(C) Sky wave

(D) Direct wave

Question: 8

The sky wave propagation is suitable for radio waves of frequency

(A) Up to 2 MHz

(B) From 2 MHz to 20 MHz

(C) From 2 MHz to 30 MHz

(D) From 2 MHz to 80 MHz

Question: 9

A diode as a rectifier converts

(A) AC to DC

(B) DC to AC

(C) Varying DC into constant dc

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

Question: 10

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

(A) EHF

(B) UHF

(C) VLF

(D) VHF