## Question

### Solution

Correct option is

2 segments

We know that vL = constant. If the length L is doubled, the frequency becomes half. Since the frequency of the second harmonic is twice that of the first harmonic (fundamental), the string must vibrate in segments now.

#### SIMILAR QUESTIONS

Q1

A pendulum clock keeps correct time at 20oC. The coefficient of linear expansion of pendulum is . If the room temperature increases to 40oC, how many seconds will the clock lose or gain per day?

Q2

A mass m is suspended from a spring of negligible mass. The system oscillates with frequency n. What will be the frequency if a mass 4 m is suspended from the same spring?

Q3

In a sinusoidal wave, the time required for a particular point to move from maximum displacement to zero displacement is 0.17s. The frequency of the wave is

Q4

The kinetic energy of a particle executing S.H.M. is 16 J, when it is at its mean position. If the amplitude of oscillation is 25 cm and the mass of the particle is 5.12 kg, the time period of oscillation is

Q5

A standing wave having 3 nodes and 2 antinodes is formed between two atoms having a separation of 1.21 Å between them. The wavelength of the standing wave is

Q6

A body is executing S.H.M. with angular frequency 2 rad s–1. If the amplitude of the motion is 60 mm, the velocity of the body at 20 mm displacement is

Q7

A wave is represented by the equation Where x is in metres and t in seconds. The expression represents

Q8

A stretched string of length 1 m, fixed at both ends, having a mass of kg is under a tension of 20 N. It is plucked at a point situated at 25 cm from one end. The string would vibrate with a frequency of

Q9

Two bodies M and N of equal masses are suspended from two separate springs of force constants k1 and k2 respectively. If they oscillate with equal maximum velocities, the amplitudes of M and N will be the ratio of

Q10

A source of sound emitting a note of frequency 200 Hz moves towards an observer with a speed v equal to the speed of sound. If the observer also moves away from the source with the same speed v, the apparent frequency heard by the observer is