Match List-I with List-II.
| List-I | List-II | ||
|---|---|---|---|
| (A) | Sitar | (I) | Light energy into electrical energy |
| (B) | Photocell | (II) | Chemical energy into electrical energy |
| (C) | Battery | (III) | Electrical energy into sound energy |
| (D) | Loudspeaker | (IV) | Mechanical energy into sound energy |
Choose the most appropriate answer from the options given below:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → (A)-(IV), (B)-(I), (C)-(II), (D)-(III)
Each device changes one form of energy into another; the match depends on what goes in and what comes out.
(A) Sitar — this matches (IV) Mechanical energy into sound energy. The player plucks the strings, and the vibrating strings produce sound.
(B) Photocell — this matches (I) Light energy into electrical energy. Light falling on its sensitive surface sets up an electric current; photocells work automatic doors and street lights.
(C) Battery — this matches (II) Chemical energy into electrical energy. The chemical reactions inside its cells drive a current through the circuit.
(D) Loudspeaker — this matches (III) Electrical energy into sound energy. The electric signal moves a coil and the cone attached to it, and the vibrating cone produces sound.