Physics - Study Mode

[#181] The unit of measurement of noise is
Correct Answer

(A) Decibel

Explanation

Solution: We measure sound intensity (also referred to as sound power or sound pressure) in units called decibels. Decibels (dB) are named in honor of Alexander Graham Bell, the inventor of both the telephone and the audiometer.

[#182] Which of the following pair is Incorrect? I. Parsec - Distance II. Barrel - Liquid III. Light year - Time
Correct Answer

(A) Only III

Explanation

Solution: Light year - Time is an incorrect pair.

[#183] Radian is used to measure
Correct Answer

(C) Angle

Explanation

Solution: Radian is used to measure angle.

[#184] What is the unit of the physical quantity Entropy?
Correct Answer

(D) Joule per kelvin

Explanation

Solution: Joule per kelvin is the unit of the physical quantity Entropy.

[#185] Kirchoff's Voltage Law is known as
Correct Answer

(B) Conservation Energy

Explanation

Solution: Kirchhoff's Voltage Law (KVL) is Kirchhoff's second law that deals with the conservation of energy around a closed circuit path.