Match List-I with List-II.
| List-I | List-II | ||
|---|---|---|---|
| (Scientific instruments) | (Uses) | ||
| (A) | Barometer | (I) | To examine the internal parts of the body |
| (B) | Calorimeter | (II) | Measures electrical power |
| (C) | Dynamometer | (III) | Measures atmospheric pressure |
| (D) | Endoscope | (IV) | Measures quantities of heat |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → (A)-(III), (B)-(IV), (C)-(II), (D)-(I)
Each instrument is named after what it measures or does: baro- (weight, pressure), calor- (heat), dynamo- (power, force), endo- (inside).
(A) Barometer — this matches (III) Measures atmospheric pressure. A falling barometer reading warns of stormy weather.
(B) Calorimeter — this matches (IV) Measures quantities of heat. It measures the heat given out or taken in during a chemical reaction or a change of state.
(C) Dynamometer — this matches (II) Measures electrical power. It measures the force, torque or power of a machine; the electrodynamometer type is used as a wattmeter.
(D) Endoscope — this matches (I) To examine the internal parts of the body. A thin tube with a light and camera is passed into the body to look at organs from inside.