Match List-I with List-II.
| List-I | List-II | ||
|---|---|---|---|
| (Device) | (Purpose) | ||
| (A) | Microphone | (I) | Used in vehicles to measure distance |
| (B) | Audiometer | (II) | For measuring the force and velocity of wind |
| (C) | Odometer | (III) | Converts sound waves to electrical vibrations |
| (D) | Anemometer | (IV) | Measures intensity of sound |
Choose the most appropriate answer from the options given below:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → A-III, B-IV, C-I, D-II
Each device is matched with the quantity it converts or measures; the name often gives the clue (audio = sound, odo = road or way, anemo = wind).
(A) Microphone — this matches (III) Converts sound waves to electrical vibrations. The sound makes a thin diaphragm vibrate, and these vibrations are turned into a varying electric current.
(B) Audiometer — this matches (IV) Measures intensity of sound. It plays sounds of known intensity (in decibels) and pitch and is used to test how well a person hears.
(C) Odometer — this matches (I) Used in vehicles to measure distance. It counts the turns of the wheels to show the distance travelled.
(D) Anemometer — this matches (II) For measuring the force and velocity of wind. Its cups spin in the wind, and the faster they turn, the higher the wind speed.