Navigate

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.

AIPMT2010
admin:

Related Questions

  1. Suppose for some reasons, radius of earth were to shrink by 1% of present value,
  2. A particle A suffers on oblique elastic collision with a particle B that
  3. The intensity of magnetisation of a bar magnet is 5×10⁴ Am⁻¹. The magnetic length
  4. A current of 2 A is made to flow through a coil which has only one turn. The magnetic
  5. The total kinetic energy of a body of mass 10 kg and radius 0.5 m moving with a velocity