1000+ General Awareness Questions and Answers for SSC CGL Pdf - 2

Question: 6

The audible frequency range of a humar ear is

(A) 20 hertz to 200 hertz

(B) 2 hertz to 20 hertz

(C) 20 hertz to 20000 hertz

(D) 200 hertz to 2000 hertz

Question: 7

The velocity of sound in a gas depends on

(A) Amplitude and frequency

(B) Intensity only

(C) Density and elasticity of gas

(D) Wavelength only

Question: 8

When two sound waves are superimposed, beats are produced when they have

(A) Different frequencies

(B) Different phases

(C) Different velocities

(D) Different amplitudes and phases

Question: 9

Sound waves of wavelength greater than that of audible sound are called

(A) Seismic waves

(B) Sonic waves

(C) Ultrasonic waves

(D) Infrasonic waves

Question: 10

Beta rays emitted by radioactive substance are

(A) Charged particles emitted by the nucleus

(B) Electromagnetic radiations

(C) Electrons orbiting around the nucleus

(D) None of the above