Question

Suppose you wanted to improve a moving.coil microphone so that it was more sensitive (e, so that it outputs a stronger induced emf for a given sound intensity). Which of the following will improve the sensitivity? a. Replace the diaphragm with one that moves more easily. b. Replace the magnet with a stronger one c. Increase the col with one with more turns d. All of the above e. None of the above

Answer 1

Answer:

d. All of the above .

Explanation:

The sensitivity of microphone will be more if even feeble sound can create greater vibration in diaphragm . Naturally it is possible if diaphragm is light and can move easily . The movement it it is controlled by current in the coil which makes it electromagnet . All factors that increase the strength of magnet like increasing the no of turns , or a strong magnet will increase the sensitivity.