A tuning fork of frequency 512 Hz makes 4 beats per second with the vibrating string

A tuning fork of frequency 512 Hz makes 4 beats per second with the vibrating string of a piano. The beat frequency decreases to 2 beats per sec when the tension in the piano string is slightly increased. The frequency of the piano string before increasing the tension was

Options

(a) 510 Hz
(b) 514 Hz
(c) 516 Hz
(d) 508 Hz

Correct Answer:

508 Hz

Explanation:

The frequency of the piano string = 512+-4 = 516 or 508. When the tension is increased, beat frequency decreases to 2, it means that frequency of othe string is 508 as frequency of string increases with tension.

admin:

Related Questions

  1. The electron drift speed is small and the change of the electron is also small
  2. Sand is being dropped on a conveyor belt at the rate of M kg/s. The force necessary
  3. Two identical capacitors are first connected in series and then in parallel.
  4. The drive shaft of an automobile rotates at 3600 rpm and transmits 80 HP
  5. An ideal spring with spring constant K is hung from the ceiling and a block of mass