Physics - Study Mode

[#911] Loudness of sound depends on
Correct Answer

(C) Amplitude

Explanation

Solution: The loudness of sound is directly proportional to the amplitude of the wave. The loudness of the sound increases with increase in the amplitude vibration. The unit of loudness is decibel.

[#912] Which one of the following animals can hear ultrasonic sound ?
Correct Answer

(D) Bat

Explanation

Solution: Bat can hear ultrasonic sound.

[#913] The instrument which uses sound waves to measure the depth of oceans is
Correct Answer

(B) Sonar

Explanation

Solution: Sonar is the instrument which uses sound waves to measure the depth of oceans.

[#914] Megahertz is a measurement of
Correct Answer

(A) Frequency

Explanation

Solution: Megahertz is a measurement of frequency.

[#915] Rate of doing work is called
Correct Answer

(C) Power

Explanation

Solution: In physics, power is the rate of doing work. It is the amount of energy consumed per unit time. The unit of power is the joule per second (J/s), known as the watt.