| Column-I | Column-II | ||
| [a] | Microphone | 1. | Wind energy into mechanical energy |
| [b] | Speaker | 2. | Mechanical energy into sound energy |
| [c] | Reeds of a harmonium | 3. | Electrical energy into sound energy |
| [d] | Sails of a ship | 4. | Sound energy into electrical energy |
A) a - 4, b - 3, c - 1, d - 2
B) a - 1, b - 2, c - 3, d - 4
C) a - 4, b - 2, c - 3, d - 1
D) a - 4, b - 3, c - 2, d - 1
Correct Answer: D
Solution :
[a] [a] Microphone \[-\] Sound energy into electrical energy. [b] Speaker \[-\] Electrical energy into sound energy. [c] Reeds of a harmonium \[-\] Mechanical energy into sound energy. [d] Sails of a ship \[-\] Wind energy into mechanical energy. a - 4, b - 3, c - 2, d - 1.
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