Q: Consider the following statements about the microphone and the speaker of a mobile phone : 1. The microphone converts sound to a mechanical signal. 2. The microphone converts sound to an electrical signal. 3. The speaker converts a mechanical signal to sound. 4. The speaker converts an electrical signal to sound. Which of the statements given above are correct?
(a)1 and 3
(b)1 and 4
(c)2 and 3
(d)2 and 4
Correct Answer: (d)
The correct answer is (b) '1 और 4'. This question from the General Studies domain tests knowledge of Miscellaneous.